Table of Contents
| A. Identification | B. Parts Catalogs | |
| C. Parts for ‘74-81 40S, 40L, 50S, 50L, 50VL | 1. Gaskets, bolts | |
| 2. Engine mounts | 21. Pedal crank | 33. Left Control |
| 3. Cylinder and head | 22. Cables | 34. Front fender |
| 4. Piston | 23. Chain tensioner | 35. Rear fender |
| 5. Intake pipe | 22. Cables | 36. Rear carrier |
| 6. Crank and case | 24. Front hub | 37. Rear shocks |
| 7-8-9. Exhaust | 25. Rear hub | 38. Handlebar |
| 10-11-12. Carburetor | 26. Front wheel | 39. Seat |
| 13. Fuel tap | 27. Rear wheel | 40. Speedometer |
| 14-15-16-17. Magneto | 28. Frame parts 40 | 41. Headlight |
| 18. Dimoby clutch | 29. Frame parts 50 | 42-43. Tail light |
| 19. Variator clutch | 30-31. Front fork | 44-45. Electrical |
| 20. Pulley | 32. Right control | 46. Mirror |
| D. Parts exclusive to ‘77-79 50VLC, ‘79-82 Moby | ||
| E. Parts exclusive to ‘77-79 50VLA | ||
| F. Parts exclusive to ‘78-79 50VLX | ||
| G. Parts exclusive to ‘79-82 Le Moped | ||
| H. Parts exclusive to ‘79-82 Traveler | ||
A. Identification
Model names: S is standard, L is deluxe, T is telescopic fork, V is variator. At first the Model 40 was made with a rigid or a telescopic fork. Then later it was only made with telescopic fork. Motobecane eliminated the unnecessary letter T, so 40TL became 40L and 40TS became 40S.
1. ’74-76 40L (US), 2. 70’s 40L (Euro)
These have the Dimoby transmission.
1. ’76-77 50L (US), 2. ’74-76 50S (US)
These have the Dimoby transmission.
1. ’76-77 50VL (US), 2. 70’s 50VL (Euro)
These have the Variator transmission.
Dimoby and Variator: Left is an AV7 Dc Dimoby engine (fixed pulley). Right is an AV7 Vc Variator engine (variable pulley). Both types have dual automatic centrifugal clutches, one for starting and one for running. They are the same except for the pulley-clutch system. They have the same crankcase and crankshaft.
From the right side the Dimoby and Variator engines are indistinguishable. From the left they are distinguished by the belt cover, belt cover mounts and clutch nut depth. The Variator clutch wheel sticks out about 10 mm more than Dimoby, so it has a 10 mm deeper clutch nut.
B. Parts Manuals
Sources: The parts info below is from these manuals.
1974-75 Motobecane America Dealer Manual
contains these parts manuals for 25 mph versions:
1. ’74-75 40TS, 40TL solo seat, Dimoby, no rear susp, thin rims
1. ’74-75 50S, 50L 00 solo seat, Dimoby (no variator)
1. ’74-75 50VL 0000 solo seat, variator
1976-82 Motobecane America Dealer Manual
contains these 8 parts manuals for 20, 25, 30 mph versions:
2. ’76-77 40TS, 40TL solo seat, Dimoby, no rear susp, thin rims
3. ’76-79 50S, 50L solo seat, Dimoby (no variator)
and ’76-79 50VL solo seat, variator
3a. ’77-79 50VLC long seat, variator
and ’79-82 Moby long seat, variator
3b. ’77-79 50VLA long seat, variator, aluminum wheels
3c. ’78-79 50VLX solo seat, variator, trail model
3d. ’79-82 Le Moped long seat, variator, aluminum wheels, deluxe
3e. ’79-82 Traveler solo seat, Dimoby (no variator), thin rims
C. Parts for 40S, 40L, 50S, 50L, 50VL
Price: The price is for each item unless noted.
Bright green is new, dark green is good used.
Quantity: The quantity is how many are on the bike,
within that parts group. ‘x’ means as needed.
45V: These are quantity columns. 4 is 40, 5 is 50, V is 50V
# qty part# price 1. Gaskets, bolts
1 1 52341 none engine ’74-75 variator 25 mph
1.1 1 53444 none engine ’76-77 Dimoby 20 mph
1.2 1 53949 none engine ’76-77 Dimoby 25 mph
1.3 1 53744 none engine ’76-77 Dimoby 30 mph
1 1 52341 none engine ’76-77 variator 25 mph
1.4 1 53745 none engine ’76-77 variator 30 mph
1.5 1 54146 none engine ’78-81 Dimoby 20 mph
1.6 1 54147 none engine ’78-81 Dimoby 25 mph
1.7 1 54149 none engine ’78-81 Dimoby 30 mph
1.8 1 54148 none engine ’78-81 variator 25 mph
1.9 1 54844 none engine ’78-81 variator 30 mph
2 1 18568 $15.0 case bolt set 2×2.1, 2×2.2, 3×2.3
2.1 1 15276 $0.90 bolt M7-1.25 x 45 flange (10 hex)
2.2 1 14936 $0.80 bolt M7-1.00 x 33 (10 hex)
2.3 1 00366 $0.90 bolt M7-1.00 x 48 (10 hex)
2.4 1 366b $1.50 bolt M7-1.00 x 40 (set has 48)
2.5 1 00366 $0.90 bolt M7-1.00 x 48 (10 hex)
2.6 1 14936 $0.80 bolt M7-1.00 x 33 (10 hex)
2.7 1 15276 $0.90 bolt M7-1.25 x 45 flange (10 hex)
2.8 5 00011 $0.50 nut M7-1.00 (10 hex)
3 1 14854 $7.00 gasket cylinder head
4 1 14895 $6.00 gasket cylinder base
5 1 16910 $3.00 gasket crankcase
6 1 52646 N/A gasket intake restricted (20mph)
6 1 17073 $3.00 gasket intake (25 and 30mph)
7 1 16912 $15.0 gasket kit 3, 4, 5, 6
# qty part# price 2. Engine mounts
1 1 19886 $6.00 bolt engine mount M8-1.00 x 140
1 1 20453 none bolt for up-exhaust M8-1.00 x 145?
2 1 20534 $4.00 spacer tube ∅8 x ∅14 x 18
3 1 17994 $11.0 R Flexibloc ∅8.0 ∅32.0 x 23
3a 1 17994a$8.00 R red rubber ∅9.7 ∅28.8 x 18
3b 1 17994b$8.00 R center tube ∅11.3 ∅8.0 x 23
4 1 19888 $3.00 ground cable, engine-to-frame
5 2 21014 $3.00 step spacer ∅8 x ∅12-17 x 10.5
6 1 20789 $11.0 L Flexibloc ∅11.0 ∅32.0 x 23
6a 1 20789a$8.00 L red rubber ∅12.4 ∅28.8 x 18
6b 1 20789b$8.00 L center tube ∅14.0 ∅11.0 x 23
7 1 17523 $2.50 nut locking M8-1.00
8 1 16541 $0.20 washer ∅8
9 1 20790 $6.00 plastic tube ∅8.0 ∅11.0 x 23
10 1 17661 $3.00 bracket for variator cover
11 4 00011 $0.50 nut M7 (10 hex)
12 7 01527 $0.50 lock washer ∅7
13 2 15276 $0.90 bolt M7-1.25 x 45 flange (10 hex)
14 2 14936 $0.80 case bolt
15 2 01526 $0.50 nut M6 special?
16 2 01172 $0.20 washer Ø6
17 1 17120 $5.00 bracket spring retainer variator
17 1 21282 $6.00 bracket spring retainer 1-speed
18 2 00968 $0.70 bolt M6 x ??
19 2 15933 $7.00 belt tension springs (each)
20 2 00366 $0.90 case bolt M7-1.00 x 48 (10 hex)
21 2 00010 $0.30 nut M6
22 1 15934 $9.00 Flexibloc lower Ø6 x Ø?? x ??
23 1 00050 $0.70 bolt M6 x 25?
24 1 21709 $4.00 lower engine mount plate right
25 1 21710 $5.00 lower engine mount plate left
26 1 17354 $3.00 bracket variator cover
Motor Mount Bushings (Flexiblocs)
top: #2 tube, #6 left Flexibloc, #3 right Flexibloc
bottom: #6a red rubber, #3a red rubber
The red rubbers replace just the old black rubber part. The old bushing metal shell and metal center tube are re-used. The shell is not removed from the frame so no special press tool is needed. Instead the black rubber is removed with a knife.
But the red rubber holes 9.7 and 12.4 are too small for the center tubes 11.3 and 14.0. The small hole must be widened by drilling. The large hole is a very tight fit without drilling. Drilling is recommended for both.
# qty part# price 3. Cylinder and head
1 1 53505 $140. cylinder E with piston J (20 mph)
1 1 53505 $140. higher top deck, lower compression
1 1 23460 $180. cylinder AA w/piston AA (25 & 30)
1 1 23460 $180. cylinder AA w/piston AA (25 & 30)
1 1 23460 $180. cylinder C with piston C (25 & 30)
1 1 23460 $180. cylinder C with piston C (25 & 30)
1 1 23460 $180. cylinder C with piston C (25 & 30)
1 1 23460 $180. cylinder E with piston E (25 & 30)
1 1 23460 $140. cylinder C with piston C good-used
1 1 23460 $140. cylinder C with piston E good-used
2 1 14721 $12.0 decomp valve kit
3 2 14821 $10.0 piston ring (pre-6/76) Ø39 x 2.0 FG
3 2 22148 $12.0 piston ring (6/76-on) Ø39 x 2.0 GI
4 1 15094 $12.0 piston pin Ø13 x 30
5 2 00658 $2.00 piston pin clip Ø13
7 1 19885 $35.0 cylinder head complete
8 2 00053 $1.00 rivet for ID plate
9 1 21294 none engine ID plate
10 1 00059 $1.00 spark plug gasket ring
11 1 01547 $4.50 spark plug NGK BR6HS
12 1 15025 $8.00 decomp valve bare
13 1 14919 $7.00 mounting lug
14 1 14855 $7.00 guide
15 1 14897 $7.00 gasket
16 1 14987 $4.00 washer
17 1 15007 $4.00 spring
18 1 15099 $6.00 valve link
19 1 00018 none cottor pin, use small bent nail
21 1 22156 $3.00 wire guide
Piston (at skirt) to cylinder clearance: new is 0.005 to 0.01 mm (0.0002 to 0.0004″), max is 0.05 mm (0.002″).
This is a very small clearance, measured at the bottom of the piston, allowed by the all-aluminum cylinder.
Usually pistons are measured at the bottom skirt, called “lower” below, because when cold, that is the widest part.
The bottom is slightly wider than the top, because there is less material, and therefore less thermal expansion.
When the piston is hot, the bottom and top are the same. The whole piston expands, as does the cylinder.
Motobecane measures just below the rings, called “upper” below. On these pistons lower is 0.02 mm bigger.
Motobecane original pistons have no marks on top, listed below as “(M)”. Inside has the M logo (some also AJ3).
< Some original replacement pistons have this logo stamped on top, listed as “(Θ)”. Inside says FRANCE.
They also have a size letter stamped on top. These were original replacements from Motobecane USA.
Other vintage aftermarket have no logo on top, listed below as “(O)”.
# qty part# price description skirt 4. Piston
1 1 22273 $70 piston W 38.92 for 38.93 cyl
2 1 22274 $70 piston AA 38.93 for 38.94 cyl
3 1 22275 $70 piston A 38.94 for 38.95 cyl
4 1 22276 n.a. piston C 38.95 for 38.96 cyl
5 1 22277 $75 piston E 38.96 for 38.97 cyl
6 1 22278 n.a. piston G 38.97 for 38.98 cyl
7 1 22279 n.a. piston J 38.98 for 38.99 cyl
8 1 22280 n.a. piston L 38.99 for 39.00 cyl
9 1 22281 $75 piston N 39.00 for 39.01 cyl
10 1 22435 $75 piston P 39.01 for 39.02 cyl
11 1 22435 $75 piston O 39.11 for very worn
# qty part# price 5. Intake pipe
1 1 16673 none intake (variator 25mph) Ø16 x 10
1 1 16619 $33.0 intake (var 30 pre-3/77) Ø17 x 12
1 1 00000 $21.0 intake Malossi 022066B Ø19 x 15
2 3 01176 $0.90 lock nut M6
3 3 01172 $0.25 lock washer Ø6
4 1 52646 none intake gasket restricted (20mph)
4 1 17073 $7.00 intake gasket (25 & 30 mph)
5 2 00796 $2.50 stud M6 x 31
6 1 53496 none intake pipe thin long (1-sp 20mph) Ø19
6 1 21201 $13.0 intake pipe long (1sp 25&30mph) Ø19
6 1 22899 $16.0 intake pipe long (var. 30 3/77-on) Ø19
7 1 21202 $6.00 support bracket
8 1 23018 $1.50 carriage bolt M6
# qty part# price 6. Crank and case
1 1 19608 none case set with seals (25 & 30)
1.1 1 19608l $15.0 left case bare (25 & 30)
1.2 1 19608r $15.0 right case bare (25 & 30)
1.3 1 19608 none case set w/seals (20mph) see note 1
2 4 00011 $0.50 head nut M7-1.0 thick, 10hex
3 4 18921 $0.30 washer M7
4 4 14716 $4.00 cylinder stud
5 2 19089 $7.00 crank seal Ø15 x Ø21 x 4
6 2 54977 $14.0 special crank bearing 6302QR
7 1 15855 $15.0 needle bearing Ø13 x Ø16 x 14(13.6)
8 1 19609 $150 crankshaft Ø16 Ø15 pre-’80 see note 2
8.1 1 19609 $150 crankshaft Ø16 Ø15 ’80-on see note 3
8.2 1 19609r $150 crankshaft Ø15 Ø15 ’80-on see note 4
9 1 16910 $3.00 case gasket x = as needed
10 x 01285 $6.00 crank shim 19 x 24 x 0.1
11 x 01286 $6.00 crank shim 19 x 24 x 0.2
12 x 01287 $6.00 crank shim 19 x 24 x 0.3
13 x 01288 $6.00 crank shim 19 x 24 x 0.5
Note 1. The 19608 20mph case set has a ridge that only allows a 53505 20mph cylinder to fit.
Note 2. At top, the 19609 pre-80 crankshaft has less threads for the 17429 pre-80 domed square-hole flywheel nut.
Note 3. Not shown, the 19609 80-on crankshaft has more threads for the 143195 large hex flywheel nut.
Note 4. At bottom, the 19609r 80-on crankshaft is machined to take regular 6302 15 x 42 x 13 bearings instead of 6302QR 16 x 42 x 13. The press fit is precise and correct. The piston pin and needle bearing are new, included, and factory sealed in wax, that peels off.
# 45V part# price 7. 8. 9. Exhaust
1 111 22872 none #9 exhaust complete ’77-81
1b 111 19869 none #8 exhaust complete ’74-76
1c 111 00000 none #7 exhaust muffler ’70-73?
2 111 22874 $18.0 #9 outlet tube cap new note 1
2 111 22874 $12.0 #9 outlet tube cap used cut short
2b 111 00687 none #7 pipe clamp bolt-nut M6
2c 111 14390 none #7 pipe clamp
2d 111 01525 $0.30 #8-9 washer M6
3 111 01545 $0.50 #8-9 end cap washer M6
4 111 00010 $0.50 #8-9 nut M6
5 111 01189 $1.70 #8-9 clamp bolt-nut M7 x 53
6 111 19891 $8.00 #8-9 clamp spacer 7-12 x 30
7 111 00011 $0.60 #8-9 clamp nut M7 hex10
8 111 01113 $0.30 #8-9 clamp washer M7
8b 111 52791 none #7 header pipe
9 111 19890 $15-8 #8-9 round clamp
10 111 00675 $4.00 #7-8-9 gasket ring
11 111 14786 $6.00 #8-9 nut stop ring
12 111 23780 $8.00 #9 aluminum washer 30-33 x 1
13 111 18500 $12-6 #7-8-9 exhaust nut M32-1.5
13 000 18500b$12.0 #7-8-9 oversize M33-1.5 note 2
14 111 20212 $6-$4 #8 exhaust stud M6 x 130
15 111 21712 $15.0 #7 oval clamp
16 111 19871 $15-8 #8 outer baffle end cap
17 111 19870 $12.0 #8 inner baffle
00 111 24339 $6.00 #9 ex. nut lock clip (not shown)
Note 1. Cut off all of the straight section of the outlet tube to improve power without much increase in noise.
Note 2. The oversize nut is for cylinders with exhaust threads that have been damaged and then cut bigger with a special bottoming tap.
10. Carburetor Dimoby 20-25-30 side mount, see Gurtner
11. Carburetor variator 25 mph center mount, see Gurtner
12. Carburetor variator 30 mph side mount, see Gurtner
13. Fuel Tap (aka gas valve or petcock) see Gas Valves
14. Flywheel magneto (6 volt) see MB magneto
15. Flywheel magneto (6 volt) see MB magneto
16. Flywheel magneto (12 volt) see MB magneto
17. Flywheel magneto (12 volt) see MB magneto
# 45V part# price years 18. Dimoby clutch
1 110 21680 $85.0 74-76 D-clutch assy 3-shoe good-used
1b 110 22914 $75.0 77-81 D-clutch assy 4-shoe good-used
2 110 14750 none 74-81 washer
3 110 14567 none 74-81 felt seal ring inner
4 110 14588 $7.00 74-81 washer 15.5-31 x 0.85
5 110 19228 none 74-81 pulley with running drum
6 222 20456 none 74-81 start clutch pivot (riveted on)
7 220 15383 $2.00 74-76 start clutch spring 13 x 34
7b 222 22402 $5.00 76-81 start clutch spring 10 x 29.5
8 222 15356 $3.50 74-81 start clutch screw
9 111 21682 $6.00 74-81 start clutch cover
10 111 14712 $18.0 74-81 needle bearing 15-19 x 21.5
11 222 14562 $6.00 74-76 washer 15-21.7 x 0.5 use 14562
11 111 14562 $7.00 77-81 washer 15-21.7 x 0.8
11a xxx 14931 $5.00 77-81 shim 15-21 x 0.1 mm
11a xxx 14932 $5.00 77-81 shim 15-21 x 0.25
11a xxx 14933 $5.00 77-81 shim 15-21 x 0.45
12 222 21946 none 74-81 start shoe wave washer
13 220 16540 none 74-76 start shoe bumper
13b222 22401 $5.00 77-81 start shoe bumper
14 110 17252 none 74-81 oil deflector pressed-on
15 110 17253 $1.50 74-81 felt seal ring outer 30-36 x 4
16 111 14561 $2.50 74-81 inverted external circlip 15 x 1
17 111 14563 $2.50 74-81 internal circlip 22 x 1.0
18 110 17454 $4-2 74-81 Dimoby clutch nut M10-1.0 x 8
19 111 14587 none 74-76 grease zerk nipple type
19b111 22896 $8-5 77-81 grease zerk flat type (shown)
20 110 21683 none 74-76 D-clutch wheel 3-shoe good-used
20 110 21683 none 74-76 starting drum and running clutch
20b110 22898 $45.0 77-81 D-clutch wheel 4-shoe good-used
20b110 22898 none 77-81 starting drum and running clutch
21 110 22147 none 74-76 start set, 2 of 21,13,7 use 22400
21b110 22400 $45.0 76-81 start set, 2 of 21b,13b,7b
In June ’76 the start shoe set changed to 22400 on both Dimoby and variator clutch versions.
Dimoby clutch wheels: to 3-shoe 1, ’77 4-shoe
Variator clutch wheels: to-’76 21051, ’77-on 22925
Dimoby clutch wheels: to-’76 21683, ’77-on 22898
Variator pulley-clutches: to-’76 21056, ’77-79? 23695, ’80?-on 24659
Dimoby pulley-clutches: to-’76 21680, ’77-on 22944
The Variator clutch wheel sticks out 18mm more than the Dimoby wheel. So it’s that much closer to hitting the left pedal arm.
# 45V part# price years 19. Variator clutch
1 001 21056 none 74-76 V-clutch assy 3-ball 3-shoe new
1 001 23695 none 77-79 V-clutch assy 3-ball 4-shoe new
1 001 23695u$90.0 77-79 V-clutch incomplete good-used
1 001 23695u none 77-79 without 10, 11, 13, 14, 19, 21, 22
1 001 23695u none 77-79 with rusty or scratched clutch wheel
1 001 24659 none 80-81 V-clutch assy 4-ball 4-shoe new
2 001 16845 $5.00 74-81 pulley nut M25-1.0 left thread hex 35
3 001 17797 none 74-81 fixed pulley cheek M27-1.0 thread
4 001 19262 $18.0 74-81 movable pulley cheek
5 001 20638 none 74-79 ball retainer 3-ball
5 001 23398 $14.0 80?81 ball retainer 4-ball
6 003 16723 $1.50 74-81 ball for variator 12 mm
7 222 15356 $3.50 74-81 start clutch screw
8 222 22401 $5.00 74-81 start clutch bumper
9 001 16842 $48.0 74-81 variator hub
10 222 14562 $6.00 74-76 washer 15-21.7 x 0.5 use 14562
10 111 14562 $7.00 77-81 washer 15-21.7 x 0.8
10a xxx 14931 $5.00 77-81 shim 15-21 x 0.1 mm
10a xxx 14932 $5.00 77-81 shim 15-21 x 0.25
10a xxx 14933 $5.00 77-81 shim 15-21 x 0.45
11 111 14561 $2.50 74-81 inverted external circlip 15 x 1
12 001 21051 none 74-76 V-clutch wheel 3-shoe new
12 001 21051 none 74-76 starting drum and running clutch
12 001 22925 none 77-81 V-clutch wheel 4-shoe new
12 001 22925 none 77-81 starting drum and running clutch
12 001 22925u$80.0 77-81 V-clutch wheel 4-shoe good-used
12 001 22925u none 77-81 original, rusty and/or scratched
13 001 17455 $9-6 74-81 variator clutch nut M10-1.0 x 21
14 111 14587 none 74-76 grease zerk nipple type (shown)
14b111 22896 $8-5 77-81 grease zerk flat type
15 001 20683 $30.0 74-81 running clutch drum
16 222 16542 none 74-76 start wave washer
16b222 21946 none 77-81 start wave washer
17 002 16539 none 74-76 start shoe bare
17 001 22924 none 74-76 start shoe set use 22400
17b001 22400 $45.0 76-81 start shoe set
18 002 16721 none 74-76 start shoe spring
18b002 22402 $5.00 77-81 start shoe spring 10 x 29.5
19 001 15187 $12.0 74-81 shield ring inner
20 222 20456 none 74-81 start clutch pivot pin
21 111 14712 $18.0 74-81 needle bearing 15-19 x 21.5
22 111 14563 $2.50 74-81 internal circlip 22 x 1.0
23 001 15349 none 74-81 o-ring seal 2.5 x 20 (25od)
23 001 15349s $0.70 74-81 substitute 2.61 x 18.7 (24od) = 3/32 x 3/4″
24 001 19851 40–20 74-81 variator belt cover
25 001 17426 $3.00 74-81 plastic washer
26 001 17425 $6.00 74-81 belt cover screw
26 001 17425u $3.00 74-81 belt cover screw used
# 45V part# price 20. Pulley see note 1
1 110 18940 none pulley 12T Dimoby 20 mph
1 111 16653 none pulley 11T Dimoby 25, variator 25-30
1 110 20731 none pulley 13T Dimoby 30 mph
2 110 18939 $15.0 sprocket 12T Dimoby 20 mph
2 111 17352 $15-9 sprocket 11T Dimoby 25, variator 25-30
2 110 20732 $15.0 sprocket 13T Dimoby 30 mph
3 111 14756 none belt 14-9.0-830 Optibelt original
3 111 14756r $21.0 belt 14-7.9-828 Ventico D24 repl.
4 222 17353 $4.00 rubber sprocket ring 25-33 x 3
5 111 15219 $3.00 extension spring
6 111 16960 $2.00 spring limiter
7 111 15220 none spring rivet
8 111 18275 $6-$4 shoulder bolt M8-1.0 x 9, ∅12 x 5
9 110 17517 $26.0 lock lever bare for 12 tooth
9 111 17515 $29.0 lock lever bare for 11 tooth
9 110 20735 none lock lever bare for 13 tooth
10 111 15217 $2.00 washer
11 111 15216 $2.00 selector knob
12 111 15218 $2.00 pivot pin
13 222 14330 $18.0 needle bearing HK1612 16-22 x 12
14 111 14147 $1.50 pivot nut M8-1.0 rounded
15 110 17518 $36.0 lock lever set for 12 tooth
15 111 17516 $39.0 lock lever set for 11 tooth
15 110 20736 none lock lever set for 13 tooth
16 100 18429 none motor chain 415 93+1L for 40 (20)
16 100 18429r $20.0 motor chain 415H 94L see note 2
16 100 20766 none motor chain 415 90+1L for 40 (25)
16 100 20766r $24.0 motor chain 415H 91L see note 2
16 100 53874 none motor chain 415 91+1L for 40 (30)
16 100 53874r $20.0 motor chain 415H 92L see note 2
16 010 18368 none motor chain 415 99+1L for 50 (20)
16 010 18368r $22.0 motor chain 415H 100L see note 2
16 010 17693 none motor chain 415 96+1L for 50 (25)
16 010 17693r $24.0 motor chain 415H 97L see note 2
16 010 18427 none motor chain 415 97+1L for 50 (30)
16 010 18427r $20.0 motor chain 415H 98L see note 2
16 001 18370 none motor chain 415 102+1L var. 25-30
16 001 18370r $25.0 motor chain 415H 103L see note 2
17 111 17695 $5.00 master link 415 original
17 111 17695r $3.00 master link 415H (not for 415)
Note 1. There are three different sprocket sizes 11, 12 and 13 tooth. Each sprocket has a specific lock lever. The lock lever and sprocket are part of the pulley complete. So there are three pulley completes.
Note 2. The two rubber rings #4 must be removed for the replacement chain 415H because the taller link plates cause the chain to not fit the sprocket correctly. That causes grinding and skipping.
# 45V part# price 21. Pedal crank
1 111 20056 none pedal set M14-1.25 thread original
1 111 20056r $20.0 pedal set M14-1.25 replacement
2 111 20057 none right pedal M14-1.25 thread original
3 111 20058 none left pedal M14-1.25 thread original
4 111 20733 22-15 right pedal arm M14-1.25
4 001 22925 none right pedal arm for 50VLX (more offset)
5 111 14158 $1.50 circlip external 16 x 1
6 111 15998 $7.00 washer 16-26 x 1.0
7 222 14179 $7.00 pedal shaft bushing 16-24 x 19
8 111 16566 $2.50 circlip inverted external 16 x 1
9 xxx 14863 none shim washer 16-30 x 0.1
9 xxx 14865 $7.00 shim washer 16-30 x 0.3
9 xxx 15001 $7.00 shim washer 16-30 x 0.75
10 111 20737 $45.0 pedal shaft
11 111 14153 $7.00 washer 16-27 x 2.0
12 111 16568 $3.00 shield ring (oil deflector)
13 111 20441 none wedge pin nut orig.
14 111 20734 $45.0 left pedal arm M14-1.25
15 222 00006 $2.00 wedge pin w/nut 9.0 replacement
16 111 20738 $8.00 spacer 16-20 x 13
17 222 20697 none pedal cap for original pedal
18 111 22868 $4.00 grease fitting brass press-in
19 100 20765 $11.0 pedal chain 87+1L for 40 (18T)
19 011 21142 $11.0 pedal chain 93+1L 50, 50V (18T)
20 111 14368 $2.00 master link 1/2 x 1/8
22. Cables see Motobecane Cables
# 45V part# price 23. Pedal chain tensioner
1 011 16891 $39.0 tensioner complete for 50
2 022 01815 $0.50 mount nut M5
3 022 00874 $0.20 mount washer M5
4 011 00004 $1.50 thin washer+nut M6
5 011 16688 none roller complete
6 011 14356 $1.00 roller screw+nut M6 x 19
7 011 16689 none roller spacer ∅6-8 x 11.5
8 011 14354 none bridge
9 011 15623 none spring
9a 011 15623a none pivot-anchor w/M7 nut
10 011 15767 $1.50 spring plate
11 022 15629 $2.50 mount bolt+nut M5 x 19 special
12 011 15624 none tensioner pivot
13 011 15625 $8.00 tensioner arm
21 100 22943 29-22 tensioner complete for 7, late 40
22 100 22943a none pivot-anchor w/M6 nut
23 100 01526 $1.50 nut M6 flange
24 100 22944 $5.00 spring
31 100 16111 $45.0 tensioner complete for early 40
33 100 16111a $8.00 tensioner arm
41 200 16111b $1.00 mount bolt+nut M6 x 20
24. F. hub Motobecane see Leleu wheel parts
24A Front hub Leleu xxxsee Leleu wheel parts
25. R. hub Motobecane see Leleu wheel parts
25A Rear hub Leleu xxxxsee Leleu wheel parts
# 45V part# price 26. Front spoke wheel
1 100 53421 $00.0 front wheel thin complete
1 011 53470 $00.0 front wheel wide complete
2 100 20742 $00.0 rim 17 x 1.2? 36 hole
2 011 19634 $00.0 rim 17 x 1.5 36 hole
3 100 53571 $35.0 tire 2.00-17 Vee Rubber 126
3 011 53572 $36.0 tire 2.25-17 Shinko
4 111 52219 $10.0 tube 2.25-17 fits 2.00
5 111 17851 $1.50 rim strip
6 (36) 17859 $1.00 spoke nut 0.60 thread
7 (36) 19625 $2.00 spoke 168 x 3.0-0.60
# 45V part# price 27. Rear spoke wheel
1 100 53424 $00.0 rear wheel thin 44T Dimoby 25-30
1 100 53424a none rear wheel thin 48T Dimoby 20
1 010 53470 $00.0 rear wheel wide 44T Dimoby 25-30
1 010 53871 none rear wheel wide 48T Dimoby 20
1 001 53753 $00.0 rear wheel wide 54T variator 25-30
2 100 20742 $00.0 rim 17 x 1.2? 36 hole
2 011 19634 $00.0 rim 17 x 1.5 36 hole
3 100 53571 $35.0 tire 2.00-17 Vee Rubber 126
3 011 53572 $36.0 tire 2.25-17 Shinko SR704
4 111 52219 $10.0 tube 2.25-17 fits 2.00
5 111 17851 $1.50 rim strip
6 (36) 17859 $1.00 spoke nut 0.60 thread
7 (36) 21195 $1.80 spoke 174 x 3.0 x 0.60
# 45V part# price 28. Model 40 frame parts
1 100 53405 none 74-79 frame yellow
1 100 53756 none 74-79 frame orange
2 100 22185 none 74-76 tank set 23164+23165
2 100 23164 none 74-76 tank sticker R gold
2 100 23165 none 74-76 tank sticker L gold
2 111 23111 none 77-79 tank sticker R sil/blk
2 111 23112 none 77-79 tank sticker L sil/blk
3 111 53429 $21.0 74-76 gas cap new w/vent switch
3 111 53429u $15.0 53429 used with no dip stick
3 111 54444 $32.0 77-79 gas cap chrome M logo
3 111 54444u none 54444 used with no dip stick
3 111 52225 $28.0 77-79 gas cap plastic off-white
3 111 52225u $19.0 52225 used with no dip stick
4 111 20460 none 74-79 gas cap gasket
5 111 17202 none tank moulding chrome
8 111 21783 $8.00 cable holder
9 111 20106 none tire pump
10 111 19163 none seat post clamp
11 111 14991 none clamp bolt and nut
12 111 00137 none clamp washer
14 111 22187 none 74-76 M sticker
14 111 22376 $2.00 77-81 M sticker = 23376?
15
16
17
18
19
# 45V part# price Model 40 frame continued
1 100 22239 none 74-76 side sticker R
1 100 23166 none 77-79 side sticker R “40”
2 100 22247 none 74-79 side cover R
2-8 100 22247n $85.0 74-79 side cover set new white
2-8 100 22247u $70.0 74-79 side cover set used off-white
3 100 21779 none 74-79 floor mat set
4 111 53428 none 74-76 gas valve sticker black?
4 111 54313 none 77-79 gas valve sticker white?
5 100 21969 none cover moulding
8 100 22248 none side cover L
9 100 22240 $15.0 74-76 side sticker L
9 100 23167 none 77-79 side sticker L “40”
10 110 18376 $15.0 74-81 Dimoby belt guard
11 100 20349 $12.0 stand spring Model 40 ∅14.5 x 119
12 100 21024 none center stand short (primed)
13 200 20637 $2.00 stand nut M8-1.0 flange-lock
14 200 20586 $9-$6 shoulder bolt M8-1.0 x 19, ∅11 x 7
6 666 17424 $5.00 A side screw M5-0.9 x 12 w/washer
6 666 17424s $2.00 substitute M5-0.9 x 16 philips
7 669 17426 $3.00 I plastic washer off-white
7 009 17426s $3.00 J plastic washer black
1. Model 40 side covers new, 2. used off white
# 45V part# price 29. Model 50 frame parts
0 022 13237 $19.0 74-77 50L, VL tank emblem R or L
1 010 20757 none 74-77 50S 00 tank sticker R white
1 111 23111 none 77-81 (all) 00 tank sticker R sil/blk
2 010 20758 none 74-77 50S 00 tank sticker L white
2 111 23112 $12.0 77-81 (all) 00 tank sticker L sil/blk
3 011 23109 none 74-77 50L, VL tank plate R smooth
3 111 21128 none 77-81 (all) 00 tank plate R slotted
4 011 21127 none 74-77 50L, VL tank plate L smooth
4 111 23110 none 77-81 (all) 00 tank plate L slotted
5 011 21787 $10.0 74-81 tool box body
6 111 22187 none 74-76 M sticker
6 111 22376 $2.00 77-81 M sticker = 23376?
0 111 53428 none 74-76 gas valve sticker black?
0 111 54313 none 77-79 gas valve sticker white?
7 011 21793 none 74-77 frame cover orange
7 011 21794 none 74-77 frame cover yellow
7 011 54326 none 78-81 frame cover black
7 011 54289 none 78-81 frame cover met blue
7 011 54290 none 78-81 frame cover met red
7 011 54456 none 78-81 frame cover dark blue
7 011 54697 none 78-81 frame cover copper
8 011 21854 $45.0 74-77 swing arm orange
8 011 21981 none 74-77 swing arm yellow
8 011 54334 none 78-81 swing arm black
8 011 54286 none 78-81 swing arm met blue
8 011 54287 none 78-81 swing arm met red
8 011 54312 none 78-81 swing arm dark blue
8 011 54696 none 78-81 swing arm copper
9 011 21176 none 74-81 center stand long
10 001 19851 $13.0 74-81 variator belt guard
11 110 18376 $15.0 74-81 Dimoby belt guard
12 011 22243 none 74-76 side sticker R
12 010 23170 none 77-79 side sticker R “50”
13 010 23171 none 77-79 side sticker L “50”
14 001 23172 none 77-79 side sticker R “50V”
14 001 54866 $15.0 79-81 side sticker R “Moby”
12 011 22244 none 74-76 side sticker L
15 001 23173 none 77-79 side sticker L “50V”
15 001 54867 $15.0 79-81 side sticker L “Moby”
16 010 22249 35-45 74-77 side cover R white
17 010 22251 none 74-77 side cover L white
18 011 54318 none 78-79 side cover R wht/gold
19 011 54319 none 78-79 side cover L wht/gold
20 011 54304 none 78-81 side cover R met red
21 011 54305 none 78-81 side cover L met red
22 011 54302 35-40 78-81 side cover R met blue
23 011 54303 none 78-81 side cover L met blue
24 011 54698 none 79-80 side cover R copper
25 011 54699 none 79-80 side cover L copper
25 011 00000 $80.0 side set MLM polished stainless
26 011 54315 none frame black
26 011 54869 none frame met red
26 011 54868 none frame met blue
26 011 53491 none frame yellow
26 011 53757 none frame orange
26 011 54691 none frame copper
26 011 54244 none frame dark blue
# 45V part# price Model 50 frame continued
1 011 22911 none helmet lock (parcel holder)
2 011 22871 none helmet lock spring
3 011 21788 none tool box cover right
4 111 20106 none tire pump
5 111 19163 none seat post clamp
6 111 14147 none clamp nut
7 111 01422 none clamp washer
8 111 14991 none clamp bolt and nut
9 044 21126 none tank plate screw
11 011 21789 none tool box cover left
12 011 20031 none cover knob-screw beige
12 011 23981 none cover knob-screw black
13 111 15871 none swingarm bushing R
14 111 15870 none swingarm bushing L
15 011 19834 $10.0 stand spring Model 50 ∅16 x 115-120
16 222 20586 $9-$6 shoulder bolt M8-1.0 x 19, ∅11 x 7
18 222 20349 $2.00 stand nut M8-1.0 flange-lock
20 111 15872 none swingarm bolt
21 111 16555 none swingarm nut
17 003 17425 $6.00 G belt screw M5-0.9 x 10 new
17 003 17425u $3.00 D belt screw M5-0.9 x 10 w/washer
19 669 17426 $3.00 I plastic washer off-white
19 009 17426s $3.00 J plastic washer black
22 666 17424 $7.00 C side screw M5-0.9 x 12 new
22 666 17424u $5.00 A side screw M5-0.9 x 12 w/washer
22 666 17424s $2.00 substitute M5-0.9 x 16 philips
23 011 10533 none grommet
24 011 20389 none grommet
25 011 21779 none floor mat set
26 111 21783 $8.00 cable holder
27 222 16949 none ID plate rivet
28 111 53415 none certification (ID) plate
29 111 17202 none tank moulding chrome
30 111 20460 none 74-79 gas cap gasket
31 111 53429 $21.0 74-76 gas cap new w/vent switch
31 111 53429u $15.0 53429 used with no dip stick
31 111 54444 $32.0 77-79 gas cap chrome M logo
31 111 54444u none 54444 used with no dip stick
31 111 52225 $28.0 77-79 gas cap plastic off-white
31 111 52225u $19.0 52225 used with no dip stick
1. Model 50 ’74-76 side covers used, 2. MLM replacements
# 45V part# price 30. Fork parts painted
1 111 53406 $100 fork complete yellow
2 111 53407 none fork stripped yellow
3 111 54097 none fork cover R yellow
4 111 54098 none fork cover L yellow
1 111 53762 $100 fork complete orange
2 111 53763 none fork stripped orange
3 111 53682 none fork cover R orange
4 111 54100 none fork cover L orange
1 011 54254 none fork complete dark blue
2 011 54255 $80.0 fork stripped dark blue
3 011 54256 none fork cover R dark blue
4 011 54257 none fork cover L dark blue
1 011 54296 $100 fork complete met red
2 011 54297 none fork stripped met red
3 011 54298 none fork cover R met red
4 011 54299 none fork cover L met red
1 011 54292 none fork complete met blue
2 011 54293 none fork stripped met blue
3 011 54294 none fork cover R met blue
4 011 54295 none fork cover L met blue
1 011 54692 none fork complete copper
2 011 54693 none fork stripped copper
3 011 54694 none fork cover R copper
4 011 54695 none fork cover L copper
1 011 54823 $100 fork complete black
2 011 54824 none fork stripped black
3 011 54825 none fork cover R black
4 011 54826 none fork cover L black
# 45V part# price 31. Front fork
1 111 22476 none fork leg right
2 222 19857 none fork leg nut
3 222 19858 $9.00 fork seal 16.5 x 23 x 3
4 222 19856 none fork boot
5 222 21105 none spring anchor nut
6 222 21103 $4.00 chrome cover
7 222 21104 $2.50 rubber washer
8 222 22478 none spring anchor
9 222 22479 none rubber cushion
10 222 16895 none fork spring
11 222 23581 none fork bushing upper
12 666 14591 none fork bushing
13 111 22477 none fork leg left
14 222 16789 none bushing
15 222 16790 none bushing
16 111 19798 $44.0 lock with keys & hardware
16 111 22311 none fork lock hardware
17 111 15528 18-12 #2 top nut cap
18 111 15526 $6.00 #3 top nut M25-1.0 oct32
18 111 15526a $6.00 #4 top washer 25-35 x 1
19 111 23016 none #5-6 upper cone and cup
19 111 23016a $12-8 #5 upper cone M25-1.0
19 111 23016b $7.00 #6 upper cup ∅30.2
20 111 14208 $7.00 #9 lower cup ∅30.2
21 222 00005 $2.00 #7 set of 26 balls 5/32″
22 111 23312 $24.0 head set 18+19+20
23 111 19859 none #10 steering tube w/cone
24 111 14606 $4.00 #11 bottom lock plate
25 111 14605 $15.0 #12 bottom bolt M20-1.0
32. Right control see Motobecane controls
33. Left Control see Motobecane controls
# 45V part# price 34. Model 50 front fender
1 010 53499 none front fender wide yellow 50S
1 010 21863 none front fender wide orange 50S
1 011 21123 none front fender wide stainless 50L, VL
2 011 21111 none rear brace stainless
3 011 21112 none front brace stainless
4 011 21124 none main brace stainless 50L, VL
4 011 53123 none main brace yellow 50S
4 011 21865 none main brace orange 50S
4 011 54828 none main brace black
5 022 00020 none main washer plain M6
6 488 01172 none washer toothed M6
7 222 00679 $1.00 main bolt+nut M6 x 10 hex
8 222 21167 none rear brace bolt M6 w/cup
9 444 00010 $0.30 nut M6
10 222 20100 none brace bolt M6 with cup
11 111 20059 $8.00 cable stop bolt M6
12 111 23660 none fender protector
# 45V part# price 34b. Model 40 front fender
1 100 53497 none front fender thin yellow 40S
1 100 53758 none front fender thin orange 40S
2 100 20782 none front fender thin chrome 40L
3 100 20761 none rear brace stainless 40
4 100 53498 none main brace yellow 40S
4 100 53759 none main brace orange 40S
5 100 20783 none main brace chrome 40L
6 200 14267 none main bolt M5-0.90 x 10
7 200 00052 none main washer M5 plain
8 200 00079 none main nut M5-0.9
9 200 01171 none washer M5
10 488 01172 none washer M6 toothed
11 444 00010 $0.30 nut M6
12 222 20100 none brace bolt M6 with cup
13 111 20059 $8.00 cable stop bolt assy M6
14 222 00679 $1.00 bolt w/nut M6 x 10 hex
15 222 21167 none rear brace bolt M6 w/cup
# 45V part# price 35. Model 50 rear fender
1 011 53476 none rear fender yellow
1 011 53761 none rear fender orange
1 011 54311 none rear fender black
1 011 54301 none rear fender met red
1 011 54300 none rear fender met blue
1 011 54700 none rear fender copper
2 022 00679 none bolt and nut
3 022 17160 none grommet
4 022 00010 none nut
5 022 00797 none washer
6 044 01172 none washer
7 011 16948 none grommet
8 022 20094 none grommet
9 011 21974 none carrier stainless
10 022 01545 none washer
11 022 20105 none bolt
# 45V part# price 35b. Model 40 rear fender
# 45V part# price 35b. and luggage rack
1 100 53490 none rear fender yellow
1 100 53760 none rear fender orange
1 100 53411 none rear fender chrome
# 45V part# price 36. Model 50 luggage rack
1 011 22167 none carrier brackets kit
2 044 20105 none carrier bolt+nut
3 011 21974 none carrier stainless
# 45V part# price 37. Model 50 rear shocks
1 022 16720 60-15 covered spring shock 8 x 275
2 022 20369 none upper bolt+nut M8-1.0 x 45
10 044 14147 none up & lower nut M8-1.0 thin
3 022 01422 none lock washer ∅8-16? inner teeth
4 088 16947 none wide washer ∅8-20? x 1?
5 022 17024 none lower spacer ∅8-14 x 5
6 022 15874 none lower bolt+nut M8-1.0 x 38
7 044 15990 none rubber bushing
# 45V part# price for 50 VLX and Le Moped
8 002 54842 60-35 exposed spring shock 8 x 275
9 004 17023 none up & lo bolt+nut M8-1.0 x ?
10 044 14147 none up & lower nut M8-1.0 thin
3 022 01422 none lock washer ∅8-16? inner teeth
4 088 16947 none wide washer ∅8-20? x 1?
11 002 20690 none upper spacer ∅8-16? x?
12 002 22674 none lower spacer ∅8-16? x ?
Note 1: The lower left shock bolt and nut are near the moving chain. They cannot stick out any more than original. Washers can be added or subtracted to adjust the space between the bolt end and the chain.
Note 2: The exposed spring shock is wider. So the mount bolts and spacers are longer.
# 45V part# price 38. Handlebar
1 111 21143 none 74-81 handlebar
2 100 20971 none 74-76 clamp set short
2 111 22403 none 77-81 clamp set long
3 200 20822 none 74-76 clamp u-bolt short
3 222 22404 none 77-81 clamp u-bolt long
4 200 20006 none 74-76 clamp bottom short
4 222 15523 none 77-81 clamp bottom long
5 444 01113 none 74-81 clamp washer
6 444 00011 none 74-81 clamp nut
7 111 21269 none 74-81 cable guide
# 45V part# price 39. Seat
1 111 00000 none x
2 111 00000 none x
3 111 00000 none x
4 111 00000 none x
5 111 00000 none x
6 111 00000 none x
7 111 00000 none x
8 111 00000 none x
9 111 00000 none x
40. Speedometer see Huret speedos
41. Headlight see Luxor headlights
42. Tail light see ULO tail lights
43. Tail light see ULO tail lights
# 45V part# price 44. ’74-77 Electrical 6 volt
1 111 22398 $17.0 6V regulator bare (dual zener diode)
1a 001 53443 $27.0 6V regulator w/black heat sink
1a 111 54704 $20.0 6V regulator w/silver heat sink
1b 111 53556 $5.00 regulator mount bracket
2 111 20330 44-28 74-77 horn small for tank note 1
2a 111 53557 $5.00 74-77 horn mount for under tank
2b 222 20672 $1.00 horn connector female mini-blade
3 111 20674 $1.00 horn screw M5 x 8 hex
4 111 00874 $0.30 horn washer M5
5 111 13609 none 74-76 branch for add-on kill switch
6 222 14762 none cable sheath ∅13 x 430 orig silver
6 222 14762 $2.00 cable sheath ∅13 x 430 repl black
7 111 53418 65-45 horn and run switch (left side)
8 222 21468 $2.00 switch screw M3-0.5 x 21
8 222 01556 $0.50 switch nut M3-0.5
9 111 53441 29-18 brake light switch (right)
10 111 53442 29-18 brake light switch (left)
11 222 21467 $2.00 rubber washer
12 222 21466 $1.50 brake switch nut
13 111 53446 69-48 main wiring harness
14 111 53534 42-25 lights switch rotary type
15 111 53579 $8.00 speedo lights wire
16 111 53580 $9.00 switch ground wire
17 100 53577 $35.0 rear harness 40″ for 40
17 011 53576 none rear harness 43″ for 50 note 2
18 111 53578 45-25 wiring harness magneto
19 111 19888 $9-6 frame-to-engine ground strap
20 111 21370 $5.00 tail light and zener ground wire
21 111 54196 $8.00 76-81 ignition wire with branch
22 111 00000 none 74-76 ignition wire no branch
00 111 21866 $3.00 magneto terminal kit
Note 1: See notes 3 to 5 about horns in the next section.
Note 2: Use the #2 rear harness 54830 below. It’s the same as 53576 except for wire color.
Note 3: Here is the Myrons wiring diagam with notes.
# 45V part# price 45. ’78-81 Electrical 12 volt.
1 011 54138 75-50 main harness grey sheath
1 011 54821 $50.0 main harness black sheath
2 011 54830 $45.0 rear harness
3 001 54266 none rear harness VLX
4 011 21370 $5.00 tail light ground wire
5 011 54140 45-25 magneto harness
6 011 54136 28-18 R brake switch 27″ grey
6 011 54166 32-22 R brake switch 27″ black
6 001 54251 28-18 R brake switch 29″ grey VLX
7 222 21466 $1.50 brake switch nut
8 222 21467 $2.00 rubber washer
9 011 54137 30-20 L brake switch 27″ grey
9 011 54165 32-22 L brake switch 27″ black
9 001 54252 30-20 L brake switch 29″ grey VLX
10 011 54135 $45.0 horn-run switch 22″ grey
10 011 54167 65-45 horn-run switch 22″ black
10 001 54250 none horn-run switch 24″ black VLX
11 222 21468 $2.00 switch screw M3-0.5 x 21
12 011 54196 $8.00 ignition wire
13 111 19888 $9-6 frame-to-engine ground strap
14 011 00000 $7.00 speedo lights wire
15 011 21439 55-40 headlight switch slide type note 1
16 011 00000 $8.00 headlight ground wire
17 011 20330 49-30 78-81 horn large for fork notes 2-5
18 011 20331 $5.00 78-81 horn mount L-type for fork
00 111 21866 $3.00 magneto terminal kit note 6
Note 1: The 21439 slide type light switch breaks easily. Because so many have been replaced, the supply has ran out. Fortunately there is an easy way to bypass the broken switch. Simply connect all three white wires together and wrap with tape. Then the lights are always on.
Note 2: In 1978 the voltage regulator under the headlight was eliminated. The horn was relocated from under the gas tank to the fork where the regulator was.
Note 3: The parts catalogs don’t show the horn mounts and they have only one horn part number 20330. So the horns and mounts are identified by actual samples and photos. 17 Motobecane horns came from stripped out bikes in the greater Los Angeles area. 8 were large with fork mount (L shape) brackets. They must be 12 volt ’78-81 because before that the regulator was in that location. 9 were small with under tank mount (twisted) brackets. They are 6 volt ’74-77. This was verified with photos from Motobecane US Models.
Note 4: 20330 horns were sold complete with mount screw, washer and a clamp-on horn button with long wire. This was an add-on option for Euro models. US models already have a built-in horn button. So here the horn is sold with the screw but without the button switch.
Note 5: Batches of used horns are tested on a running bike. They are compared and rated by loudness. Some horns get weaker with age, from corrosion on the aluminum sound plate. Any that are less loud than the others are rejected.
Note 6: Here is the Myrons wiring diagam with notes.
46. Mirror
D. Parts exclusive to 50VLC and Moby
The seat is long for two people.
On Moby the side cover stickers say Moby.
E. Parts exclusive to 50VLA
The seat is semi-long for one person.
The Motobecane-made mag wheels are different.
F. Parts exclusive to 50VLX
The handlebars are 4 inches wider. So the cables and wires that go to each side are 2 inches longer.
The shocks are stiffer with exposed chrome springs.
The exhaust is a special upswept long type.
The rear fender and rear harness are different.
G. Parts exclusive to Le Moped
The shocks are stiffer with exposed chrome springs.
The seat is long for two people and lifts up with storage tray underneath.
The sides of the gas tank have covers to make it look bigger and better.
The Motobecane-made mag wheels are different.
The cables, wirings and switch wirings are black instead of grey.
H. Parts exclusive to Traveler
The front fender is painted black instead of polished stainless.
The side cover stickers say Traveler.
The tank sides have no chrome covers
The tank stickers are different.
The cables, wirings and switch wirings are black instead of grey.
The exhaust and handlebar are black instead of chrome.