Contents:
A. ’76-82 N Non Reed Engine
A. ’83-86 P Pyramid Reed Engine
B. ’85-89 F Flat Reed Engine
Derbi Engines on US models N, P and F
Speed Versions
N and P 1976-86 had three speed versions:
30mph (2.0hp) 12mm intake, no restrictor,
one 1 mm variator limiting washer (gas mileage 117 mpg),
25mph (1.5hp) 10mm intake restrictor,
one 4 mm variator limiting washer (gas mileage 130 mpg),
20mph (1.0hp) 10mm intake restrictor,
two 4 mm variator limiting washers.
F 1985-89 had one speed version:
30mph (2.0hp) 10mm intake restrictor,
one 1 mm variator limiting washer,
43 mph actual when de-restricted!
Sources
DMCA is Derbi Motor Corporation of America, MMI is Marina Mobili Inc
1. 1977 Parts List Variant x DMCA
2. 1979 Parts List Variant x DMCA
3. 1980 Parts List C5 Diablo DMCA
4. 1982 Parts List Laguna x DMCA
5. 1984 Price List xxxxxxxx DMCA
6. 1987 Parts List Variant x National Motor
7. 1987 Parts List DS50 xxx MMI
8. 1989 Price List xxxxxxxx MMI
A.
’76-82 N Non-Reed and
’83-86 P Pyramid Reed
Four engine versions are in this group:
1. N non-reed for Variant frame ’76-82 SL, SLE
black cylinder with ∅7 cylinder stud holes
1a. same but with silver cylinder ’76-82 TT
2. N non-reed for Cradle frame ’76-82 C5, Laguna
black cylinder with ∅10 top holes for sleeve nuts
case has front studs for cradle frame
2e. same but with electric start option
3. P pyramid reed Variant frame ’83-86 SL, SLE, TT
black cylinder with ∅7 cylinder stud holes
3e. same but with electric start option
4. P pyramid reed for Cradle frame ’83-86 RD50
black cylinder with ∅10 top holes for sleeve nuts
case has front studs for cradle frame
4e. same but with electric start option
A1. Cylinder, Piston, Crank for N,N,P,P
# NNPP 0 old# 000 Derbi# 0000 price .
1 1000 82.25.030 000.82.25.030 $150 N cylinder-piston silver
1 1000 81.25.030 0A0.50.10.121 $150 N cylinder-piston black
1 0100 00.00.000 0A0.50.30.121 $150 N cylinder-piston black
1b 0010 00.00.000 0A1.25.00.031?$0.00 P cylinder-piston black
1b 0001 00.00.000 0A0.50.40.121 none P cylinder-piston black
2 1000 81.25.010 000.81.25.010 $45.0 N,P head bare ∅7 silver
2 1010 82.25.010 0F0.50.00.171 $45.0 N,P head bare ∅7 black
2 0101 00.00.000 0A0.25.00.011 $60.0 N,P head bare ∅10 black
3 1010 82.25.020 000.82.25.020 none N,P head gasket ∅7 holes
3 0101 00.00.000 0A0.25.00.021 none N,P head gasket ∅10 holes
4 2200 82.25.040 000.82.25.040 $3.50 N,N cylinder gasket 0.2mm
4b 0022 00.00.000 0A0.25.10.571 $4.00 P,P cylinder gasket 0.2mm
5 1100 82.25.570 000.82.25.570 $12.0 N,N cylinder spacer 2.0mm
5b 0011 00.00.000 0A0.25.00.041 none P,P cylinder spacer 2.0mm
6 1110 82.25.141 000.82.25.141 $130 N,N,P crank circle type note 1
6b 0001 00.00.000 0A0.25.00.141 none P crankshaft full circle RD50
7 4000 31.25.290 000.31.25.290 $1.20 N head nut M7 x 7 hex11
7b 0040 82.02.730 000.82.02.730 $4.00 P head nut M7 x 10 hex12
7c 0404 00.00.000 0A0.25.00.291 none N,P head nut M7 ∅10 x 70? sleeve
8 4040 31.25.280 000.31.25.280 $0.20 N,P head washer ∅7
8 0404 00.00.000 0C0.25.00.538 $0.30 N,P head washer ∅10
10 1111 80.25.090 000.80.25.090 none piston 37.94 x 12-17-20.5 orig
10 1111 80.25.090 000.80.25.090 $65.0 piston 37.94 x 12-17-20.5 note 2
11 1111 80.25.100 000.80.25.100 none piston bare original
12 1111 80.25.110 000.80.25.110 $10.0 upper ring 38 x 2 L-type
13 1111 67.25.110 000.67.25.110 $9.00 lower ring 38 x 1.5 GN
13 1111 00.00.000 0A0.25.00.118 $18.0 ring set 38 x 2 L and 38 x 1.5 GN
14 1111 31.25.120 0B0.25.00.128 $10.0 piston pin ∅12 x 30
15 2222 31.25.130 0B0.25.00.128 $1.50 piston clip ∅12
16 1111 21.25.170 0Z0.25.00.171 $9.00 piston bearing 12-15 x 15
18 1111 31.25.180 0B0.25.00.188 $10.0 rod bearing 16-22 x 12
19 1111 03.25.190 0C0.25.00.198 none crank pin
21 1111 00.57.203 005.71.20.300 $16.0 L crank bearing 6203-C3
22 1111 00.57.303 005.70.30.300 $10.0 R crank bearing 6303
23 2222 61.25.230 0B0.25.00.238 $8.00 L & R crank seal
24 1111 82.31.010 0A0.25.20.001 $40.0 decomp assy
25 1111 04.73.040 004.70.30.400 $2.50 decomp E-clip 4mm
26 1111 82.31.050 0A0.25.10.051 $5.00 decomp lever
27 1111 82.31.110 0A0.25.10.111 $6.00 decomp bracket
28 1111 82.31.120 0A0.25.00.121 $7.00 decomp roll pin ∅2.5 x 16
29 1111 00.04.510 000.40.51.000 $2.00 decomp screw M5 x 10 allen
30 1111 82.31.020 0A0.25.20.021 $20.0 decomp valve
31 1111 82.31.090 0A0.25.10.091 $2.50 decomp o-ring 2.0 x 4 (8 od)
32 2222 82.31.100 0A0.25.10.101 $5.00 decomp spring guide
33 1111 82.31.040 0A0.25.10.041 $9.00 decomp spring ∅10×20
34 2200 00.04.615 000.00.04.615 $0.70 N intake bolt M6 x 15 (16) allen
35 2200 00.34.060 000.00.34.060 $1.00 N intake washer M6 inner teeth
36 1100 82.25.050 000.82.25.050 $7.00 N intake gasket
37 1100 82.25.060 000.80.25.060 $35.0 N intake pipe
38 1100 50.25.580 000.50.25.580 $3.00 N intake reducer ∅12-10 (some)
00 1111 82.34.040 000.82.34.040 $12.0 exhaust gasket
Note 1. The price of a good used crankshaft depends mostly on how much wear is where the right bearing contacts the crank.
Note 2. The replacement piston is GOL 0037A-C with the skirt shortened from 23 to 20.5 mm. It has the same dimensions. Both rings are the normal type (rectangular cross-section).
A2. Case and Covers for Non-Reed N,N
# NN 0 old# 000 Derbi# 0000 price .
1 10 83.20.002 0A0.30.00.631 none N case assy SL, SLE, TT
1 01 79.30.630 0A0.30.30.631 none N case assy C5, Laguna
2 10 82.30.010 000.82.30.010 none N right case half
2 02 31.30.020 0B0.30.00.021 $0.00 N centering sleeve
3 10 82.30.031 000.82.30.040 none N left case half
3 01 79.30.730 0A0.30.20.731 $0.00 N rubber case plug
4 30 82.30.021 000.82.30.021 $0.00 N spacer
5 10 82.30.030 000.82.30.030 $0.00 N case gasket
5 01 79.30.030 0A0.30.30.031 $0.00 N case gasket
6 30 82.30.070 000.82.30.070 $0.00 N spacer
7 40 31.30.050 000.31.30.050 $4.50 N cylinder stud M7 x 117
7 04 79.30.050 0A0.30.00.051 none N cylinder stud M7 x 50?
8 11 31.30.080 0B0.30.00.081 $0.00 fill plug
9 21 56.30.120 0B0.30.00.128 $0.00 fill/drain plug gasket
10 10 82.30.150 000.82.30.150 $80.0 R cover grey (SL) #9
10 11 85.30.150 0A0.30.10.158 $80.0 R cover black (TT) #12 used
10 10 87.30.150 000.87.30.150 none R cover gold (SLE)
11 10 82.30.200 000.82.30.200 $70.0 L cover grey (SL) #10
11 10 85.30.200 000.85.30.200 $60.0 L cover black (TT) #13 used
11 10 87.30.200 000.87.30.200 $50.0 L cover gold (SLE) #11 used
11 01 80.30.201 000.80.30.201 none L cover black alloy
12 60 31.25.260 000.31.25.250 $0.00 N cushion tube
13 30 00.04.655 000.00.04.655 $1.20 N screw M6 x 55 allen
13 05 82.30.110 0A0.30.00.111 $0.80 N screw M6 x 55 slot
14 50 00.04.650 000.00.04.650 $1.00 N screw M6 x 50 allen
14 03 31.30.090 0B0.30.00.091 1 -.70 N screw M6 x 50 slot
15 10 00.04.645 000.00.04.645 $1.00 N screw M6 x 45 allen
15 02 31.30.190 0B0.30.00.191 1 -.80 N screw M6 x 45 slot
16 x0 00.04.635 000.00.04.635 $0.80 N screw M6 x 35 allen x=13
16 0y 31.30.110 0B0.30.00.111 $1.00 N screw M6 x 35 slot y=12
17 11 56.30.130 000.56.30.130 $0.00 drain plug
18 11 00.04.615 000.00.04.615 $0.70 check plug M6 x 16 allen
19 11 31.02.280 000.31.02.280 $1.50 check plug gasket ∅6
20 20 82.33.280 000.82.33.280 $0.00 N wires grommet
20 01 79.33.280 0A0.33.20.281 $0.00 N wires grommet
21 02 25.30.680 000.25.30.680 $0.00 N mount stud
A3. Case and Covers for Pyramid Reed P,P
# PP 0 old# 000 Derbi# 0000 price .
1 01 00.00.000 0A0.30.30.631 none P case set
2 10 80.30.201 000.80.30.201 none L cover black metal for e. start
2 01 00.00.000 0A0.30.20.201 $50.0 L cover black plastic #14 used
3 01 81.30.030 0A0.30.10.031 $0.00 P case gasket
4 40 31.30.050 000.00.00.000 $4.50 P cylinder stud M7 x 117
4 04 79.30.050 0A0.30.00.051 none P cylinder stud M7 x 50? short
5 22 00.00.000 0A0.30.10.021 $0.00 centering sleeve
6 01 77.30.730 0A0.30.00.731 none rubber plug
7 11 85.30.150 0A0.30.10.158 $80.0 R cover black #12 used
8 11 00.00.000 0A0.30.00.131 $0.00 drain plug
9 11 00.00.000 0A0.30.00.121 $0.00 drain plug gasket
10 11 31.30.080 0B0.30.00.081 $0.00 fill plug
11 02 25.30.680 0C0.30.00.681 $0.00 engine mount stud
12 30 00.04.655 000.00.04.655 $1.20 P screw M6 x 55 allen
12 05 82.30.110 0A0.30.00.111 $0.80 P screw M6 x 55 slot
13 50 00.04.650 000.00.04.650 $1.00 P screw M6 x 50 allen
13 03 31.30.090 0B0.30.00.091 1 -.70 P screw M6 x 50 slot
14 10 00.04.645 000.00.04.645 $1.00 P screw M6 x 45 allen
14 02 31.30.190 0B0.30.00.191 1 -.80 P screw M6 x 45 slot
15 x0 00.04.635 000.00.04.635 $0.80 P screw M6 x 35 allen x=13
15 0y 31.30.110 0B0.30.00.111 $1.00 P screw M6 x 35 slot y=12
16 11 79.33.280 0A0.33.20.281 $0.00 wires grommet
17 22 20.25.050 0D0.25.00.051 $0.00 intake gasket
18 11 00.00.000 0A0.25.00.711 none intake pipe
19 44 00.04.620 000.40.62.000 $0.70 intake bolt M6 x 20
20 44 00.34.060 003.40.06.000 $0.70 intake washer ∅6 inner teeth
21 33 00.00.000 000.40.30.600 none reed petal screw M3 x 6
22 33 00.34.030 003.40.03.000 none reed petal washer ∅3 star
23 33 20.25.630 0D0.25.00.631 none reed petal stop
24 33 20.25.650 0D0.25.00.651 none reed petal
25 11 00.00.000 0D0.25.10.641 $0.00 reed valve assy
26 11 50.25.580 000.50.25.580 $3.00 intake reducer ∅12-10 (some)
A4. Variator Clutch for N,N,P,P
# qty 0 Derbi# 0000 price .
1 1 000.82.26.820 $140 clutch sub-assy
2 1 000.82.26.170 $0.00 starting drum
3 1 000.00.00.000 $0.00 clutch shoe set
4 3 000.82.26.440 $0.00 clutch cushion
5 3 000.82.26.810 $0.00 clutch spring
6 3 000.82.26.410 $0.00 clutch washer ∅8
7 3 000.00.47.308 $0.00 external ret. ring ∅8
8 1 000.82.26.150 $75.0 start shoe set
9 2 000.82.26.070 $0.00 start cushion
10 2 000.82.26.770 $0.00 start spring
11 2 000.82.26.330 $0.00 start washer
12 1 000.82.26.460 $70.0 pulley weight plate
13 3 000.82.36.110 none weight with 2 end caps
13 6 000.82.26.420 $8.00 weight end cap
13 3 000.82.26.760 $3.00 weight bare
14 1 000.82.26.190 $0.00 weight cover-fan
15 1 000.00.57.201 $0.00 clutch bearing
16 1 000.00.47.232 $5.00 internal ret. ring ∅32
17 1 000.82.26.241 $0.00 variator washer ∅20?
18 1 000.82.26.261 $0.00 variator nut M20? x 1.0 thin
19 1 000.82.26.730 $0.00 bearing cap?
20 1 000.82.26.720 $18.0 needle bearing ∅16-22 x 12
21 1 000.82.26.480 $16.0 bearing race tube ∅10-16 x 15
22 1 000.65.25.530 $1.00 clutch washer ∅10 x 20
23 1 000.31.13.150 $8.00 clutch nut M10-1.0 x 6 hex14
24 1 000.82.26.370 $0.00 variator belt
25 1 000.80.26.120 $0.00 rear pulley inner
26 1 000.82.26.130 $0.00 variator guide
27 1 000.82.26.210 $0.00 variator spring
28 1 000.80.36.160 $0.00 rear pulley outer
29 1 000.82.26.232 $0.00 rear pulley tab washer ∅14
30 1 000.80.26.510 $8.00 rear pulley nut M14-1.5 x 5 hex19
31 1 000.82.26.380 $5.00 cover plug
32 3 000.82.36.090 $9.00 weight cover guide
A5. Transmission ’76-77? for N
This transmission version was on early US models. It has two pedal chains! It is from the 1977 parts catalog (in Spanish) with 32 items listed.
# qty 0 Derbi# 000 price 1977 catalog (Spanish)
1 2 000.00.471.15 $1.50 external clip ring 15
2 1 000.82.28.372 none sprocket 19 tooth
3 1 000.82.28.400 $7.00 left drive seal 15-30-7
4 1 000.00.57.302 $10.0 L drive bearing 6302
5 1 000.82.35.440 none retaining cup washer
6 1 000.82.35.430 none pinion securing piece
7 1 000.82.35.421 none left pedal pinion 10T
8 1 000.82.35.411 none right pedal pinion 15T
9 3 000.82.35.271 none pedal pinion stop pin
10 1 000.82.28.641 none gear shifter
11 1 000.82.28.220 none gear wheel II 52T
12 1 000.82.28.560 none washer
13 2 000.82.28.450 none .
14 1 000.82.28.460 none .
15 1 000.82.28.280 none bushing
16 2 000.82.35.140 none pedal chain
17 1 000.82.28.300 none driven pulley shaft tapered
18 1 000.00.57.205 $17.0 R drive bearing 6205 25-52-15
19 1 000.82.30.460 $9.00 R drive seal 25-40-7
20 1 000.82.28.050 none engage lever SL, SLE
20 1 000.85.28.050 none engage lever TT
21 1 000.82.28.060 none engage shaft
22 1 000.82.28.360 $8.00 engage seal 12-18-3
23 1 000.31.26.340 none engage shaft pin
24 1 000.82.28.090 none engage fork
25 2 000.82.28.100 none engage pawl (dog)
26 2 000.00.31.060 $0.20 washer M6
27 2 000.00.23.060 $0.90 nut M6 nylock
28 1 000.82.28.160 none N drive shaft bare
28 1 000.50.28.130 none N drive shaft assy
29 1 000.82.28.970 none engage spring
30 2 000.00.61.040 $0.20 engage ball 3/16″
31 1 000.82.28.930 none engage lever cover
32 1 000.82.26.020 none washer
# qty 0 Derbi# 0000 price 1977 catalog (Spanish)
1 1 000.82.35.030 22-15 left pedal crank
2 2 000.82.35.040 $2.00 wedge pin ∅9 with 2, 3
3 2 000.00.33.070 $0.50 lock washer ∅7
4 2 000.00.21.070 $0.60 nut M7
11 1 000.82.35.260 $9.00 pedal driver
12 1 000.82.35.320 $8.00 friction spring
13 2 000.82.28.310 none washer, left pedal
14 1 000.82.28.960 none gear assy
15 2 000.82.28.490 $00.0 needle bearing ∅16-20 x ??
16 1 000.82.28.490 $00.0 spacer ∅16-20 x ??
17 a 000.82.28.990 none shim washer 2.0
17 a 000.82.28.311 none shim washer 1.8
17 a 000.82.28.312 none shim washer 1.6
18 1 000.82.35.130 $32.0 right pedal crank
19 1 000.82.35.121 none right pedal black
22 2 000.82.35.300 $5.00 pedal shaft seal 16-24-4
A6. Transmission ’79?-86 for N,N,P,P
This transmission version with one pedal chain, from the 1979 USA parts catalog (in English) has 27 items. This was on most US models.
# qty 0 Derbi# 0000 price 1979 catalog (English)
1 2 000.00.471.15 $1.50 external clip ring 15
2 1 000.82.28.372 none sprocket 19 tooth
3 1 000.82.28.400 $7.00 drive seal 15-30-7
4 1 000.00.57.302 $10.0 L drive bearing 6302
5 1 000.50.35.410 none pedal sprocket 15 tooth
6 1 000.50.28.640 none engage dog
7 1 000.82.28.221 none gear 52T
8 1 000.82.28.560 none washer
9 1 000.82.28.560 none washer
9 a 000.82.28.561 none washer 16-25 x 0.45
9 a 000.82.28.562 $5.00 washer 16-25 x 0.60
9 a 000.82.28.563 none washer 16-25 x 0.70
9 a 000.82.28.564 $5.00 washer 16-25 x 0.80
10 1 000.82.28.492 $15.0 dual needle bearing ∅16-20 x 50
11 1 000.82.28.280 none bushing
12 1 000.82.35.140 $20.0 pedal chain #35 37 links
13 1 000.82.28.300 none driven pulley shaft tapered
14 1 000.00.57.205 $17.0 R drive bearing 6205 25-52-15
15 1 000.82.30.461 $9.00 R drive seal 25-40-7
16 1 000.82.28.050 15-$9 engage lever SL, SLE
16 1 000.85.28.050 none engage lever TT
17 1 000.82.28.060 $12.0 engage shaft
18 1 000.82.28.360 $8.00 engage seal 12-18-3
19 1 000.31.26.340 $5.00 engage roll pin 3.5 x 18
20 1 000.82.28.090 $12.0 engage fork
21 2 000.50.28.640 $7.00 engage pawl
22 2 000.00.31.060 $0.20 washer M6
23 2 000.00.23.060 $0.90 nut M6 nylock
24 1 000.50.28.160 none N drive shaft bare
24 1 000.50.28.130 none N drive shaft assy
24 1 0A0.28.20.071 none P drive shaft assy longer
25 1 000.82.28.970 $6.00 engage spring ∅4.5 x 17 11-coils
26 2 000.00.61.040 $0.20 engage ball 3/16″
27 1 000.82.28.930 none engage lever cover
# qty 0 Derbi# 0000 price 1979 catalog (English)
1 1 000.82.35.030 22-15 left pedal crank
2 2 000.82.35.040 $2.00 wedge pin ∅9 with 2, 3
3 2 000.00.33.070 $0.50 lock washer ∅7
4 2 000.00.21.070 $0.60 nut M7
5 1 000.82.35.092 none pedal shaft
6 1 000.82.28.560 none washer
7 1 000.82.35.390 none nut M19-1.0 x 6 hex 25
8 1 000.82.35.380 none tab washer
9 2 000.82.35.240 none washer
10 1 000.50.35.050 none pedal sprocket
11 1 000.82.35.260 $9.00 pedal driver
12 1 000.82.35.320 $8.00 friction spring
13 2 000.82.28.310 none washer, left pedal
14 1 000.82.28.960 none gear assy
15 1 000.82.28.492 $15.0 dual needle bearing ∅16-20 x 50
16 a 000.82.28.990 none shim washer 2.0
16 a 000.82.28.311 none shim washer 1.8
16 a 000.82.28.312 none shim washer 1.6
17 1 000.82.35.130 $32.0 right pedal crank
18 1 000.82.35.121 none right pedal
19 1 000.82.35.021 none left pedal
20 1 000.82.35.070 none sprocket spacer
21 2 000.82.35.300 $5.00 pedal shaft seal 16-24-4
Note 1. The drive sprocket on a ’83-86 pyramid reed engine sticks out farther than non-reed engine. So the non-reed left cover with the dimple over the sprocket won’t fit unless the dimple is cut away leaving a hole.
B.
Flat Reed Engine ’86-89
Two engine versions are in this group:
1. F flat-reed ’85-86 SL-X, SLE-X, ’87-89 Variant Sport .
silver all-aluminum cylinder with ∅7 stud holes
2. Fe flat-reed ’86-89 Derbi DS50 .
silver all-aluminum cylinder with ∅7 stud holes
retractable left pedal, CDI ignition, electric start
B1. Cylinder, Piston, Crankshaft ’85-89
# qty 0 old# 000 Derbi# 0000 price .
1 1 00.00.000 0F0.50.00.121 none cylinder-piston
2 4 82.00.730 000.82.00.730 none head nut
3 4 31.25.280 000.31.25.280 none head washer
4 1 82.25.110 0F0.50.00.171 $45.0 head bare
5 1 00.00.000 0F0.25.00.021 none head gasket
6 2 00.00.000 0F0.25.00.041 $4.00 base gasket
7 2 00.00.000 0F0.25.00.111 $10.0 piston ring 40 x 1.5 GI
8 1 00.00.000 0F0.25.00.091 none piston
9 1 31.25.120 000.31.25.120 none piston pin
10 2 31.25.130 000.31.25.130 none piston clip
11 1 00.00.000 0F0.50.00.011 none rod assy
12 1 21.25.170 000.21.25.170 $9.00 piston bearing 12-15 x 15
13 1 00.00.000 005.90.20.400 none R crank bearing 6204 C4
14 1 00.00.000 005.91.20.300 none L crank bearing 6203 C4
15 1 00.00.000 0F0.25.00.141 none crankshaft
16 1 31.25.180 000.31.25.180 none rod bearing
17 1 00.00.000 0F0.25.00.191 none crank pin
18 2 00.00.000 0F0.25.00.231 $8.00 L & R crank seal 17-30-7
B2. Variator Clutch ’85-89
B3. Case Group Pedal Start ’85-89
B4. Case Group Electric Start ’85-89
B5. Transmission Group 1 ’85-89
B6. Transmission Group 2 ’85-89
B7. Transmission Group 3 ’85-89
B8. Electric Start ’85-89
B9. Exhaust ’85-89
B10. Carburetor ’85-89
B11. Magneto Points ’85-89
B12. Magneto CDI ’85-89
