Indian Engine Parts

updated 2020-12

Indian AMI-50 Chief Engine Parts

Contents:
  1. Cylinder and Head
1a. Carburetor
  2. Clutch and Cover
  3. Valves and Cam
  4. Transmission 
  5. Piston and Crank
  6. Case and Magneto

 

1978 Parts Book
pages 1 to 36

1979 Parts Book
pages 1 to 36

7-79 Parts Book
pages 1 to 36

1980 Parts Book
pages 1 to 36

6-81 Supplement
pages 37-42

 

 

 

 

 

 

 

 

 

The 1978 Parts Book has better illustrations than the later ones. So the 1978 pictures are used here. There are no suffixes a, b, c, etc on any item numbers. So there was only one version of every part. There was no carburetor parts section (Tillotson). 

The 1979 Parts Book had some parts that came in two versions. They had an A or B after the item number, such as the carb, intake pipe, fork, fork lock and battery. Some of the 1978 item numbers changed in the 1979 and later parts manuals. There was no carburetor parts section (Tillotson or Keihin). 

The 07-1979 Parts Book had some parts that came in three versions. They had an A B or C after the item number, such as the carb, intake pipe and magneto. There was no carburetor parts section (Tillotson, Keihin or Mikuni). The page numbers were 1 to 36.

The 1980 Parts Book had some parts that came in four versions. They had an A B C or D after the item number, such as intake pipe. There was no carburetor parts section (Tillotson, Keihin or Mikuni). The page numbers were 1 to 36?

The 06-1981 Parts Supplement had the Keihin and Mikuni parts, the 79-later 2-coil magneto, and Mira mag wheel parts sections. The page numbers were 37 to 42. So it was a continuation of the previous books. It was a stack of pages to be inserted into the back of any parts manual. 

 

 


Section 1 – Cylinder and Head

Indian AMI-50 with Keihin PA-MOA carb

 

 

 

 

 

 

 

 

 

 

OHV: This type is over head valve OHV, not over head cam OHC. Head or piston replacement is easier on OHV than on OHC, because the cam and cam chain are in the bottom, out of the way.

Heads: Indians have 2 types of cast iron cylinder heads, #3 black ’78-80 and 3d silver ’80-81. Head #3 has 33mm intake bolt spacing, while 3d has 35mm. Head 3d has a more side-facing flange angle. Head 3d has valve stem seals. Head 3 did not.

Pipes: Indians have 4 types of intake pipes, 4a, 4b, 4c, 4d. The first 3 are for head #3, and so have a 33mm lower bolt hole spacing. Pipe 4d is for head 3d, and so has a 35mm lower bolt hole spacing.

1. Cylinder and Head

 

 # qty price  Indian part#  description
u00 1 $50.0 E000-00-50 engine gasket set
u01 1 $155  E110-00-50 cylinder new  0.007″gap
01u 1 $50.0 E110-00-50 cylinder used 0.018″gap
u02 1 $7.00 E910-00-50 cylinder base gasket
u03 1 $140. E120-00-50 head early black bare new
03u 1 $70.0 E120-00-50 head early black bare used
03d 1 none   E120-50-50 head late silver bare new
04a 1 $48.0 E220-00-50 intake pipe ’78 Tillotson ∅5 x 31
04b 1 none   E220-20-50 intake pipe 78-80 Keihin 6 x 32
04c 1 $52.0 E220-30-50 intake pipe 78-80 Mikuni ∅18
04d 1 $67.0 E220-
50-50 intake pipe 80-81 Mikuni ∅18
04e 1 none   E220-40-50 intake pipe 80-81 Keihin 6 x 32

u05 1 $26.0 E911-00-50 cylinder head gasket
u06 1 $29.0 E130-00-50 valve cover bare
06u 1 $29.0 E130-00-50 valve cover assy used
u08 1 $18.0 E912-00-50 valve cover gasket
u09 1 $16.0 E160-00-50 decomp shaft/lever
u10 1 $9.00 E162-00-50 decomp shaft spring
u11 1 $3.00 E161-00-50 decomp bracket
12a 1 $14.0 E230-00-50 insulator Tillot.  ∅5 x 31
12b 1 $21.0 E230-20-50 insulator Keihin ∅6 x 32 
13a 2 none   E920-00-50 i. gasket use 13b ∅5 x 31 
13b 2 $2.50 E920-20-50 int. pipe gasket ∅6 x 32  

Indian heads

Indian intake gaskets

13c 1 $4.00 E920-30-50 int. head gasket ∅6 x 33 
13d 1 $4.00 E920-50-50 int. head gasket ∅6 x 35 
13c 1 $4.00 13c, 13d are 13b with holes widened 
13d 1 $4.00 by using a 1-hole paper punch ∅6
u14 1 $0.20 H106-00-50 washer M6
15a 1 none   E163-00-50 circlip decomp 7mm
15b 1 $2.00 E163-10-50 substitute
6mm widened

u16 1 $3.00 E164-11-50 o-ring ∅1.5 x 5 (8 od) 
u17 1 $0.50 H462-00-50 hex bolt M6 x 20
u18 2 $0.80 H467-10-50 hex bolt M6 x 71(70)
u19 1 $2.00 H461-00-50 hex bolt M6 x 100

Indian gasket set

u20 1 $2.00 H461-12-50 hex bolt M6x112(110)
u21 1 $0.60 H462-80-50 hex bolt M6 x 28(30)
u22 1 $0.60 H463-20-50
 hex bolt M6 x 32(30)
u23 1 $0.80 H465-60-50 hex bolt M6 x 56(55)
u24 2 $2.00 H563-00-50 exhaust stud M6
25a 2 $2.00 H662-00-50 carb screw for Til. M5 x 55?
25b 2 $0.80 H662-20-50 carb screw for Kei. M6 x 20
26a 2 $1.00 H662-50-50 intake screw Til. M6 x 25
26b 2 $1.00 H662-20-50 intake screw Kei M6 x 20

u27 2 $3.00 E532-00-50 knock pin 8 x 12

 

 

Black early head #3
for all three carburetors. 
Int. flange faces more back.
Here with intake pipe #4a
and Tillotson carburetor.

Black early head #3
for all three carbs. 
Int. faces more back.
Here with pipe #4b
and Keihin carb.

Black early head #3
for all three carbs.
Int. faces more back.
Here with pipe #4c
and Mikuni carb.

Indian with Mikuni carb intake bolts fase more outward

Silver late head #3d
for Mikuni carburetor.
Int. faces less back.
Requires pipe #4d
and Mikuni carb.

 

 

 

 

 

 

 

 

 

 

 

 


Section 1a – Carburetor

Some 1978 Indians had a Tillotson “no-float” (12mm) carb, with choke lever on carb.
Some 1978, most 1979 had a Keihin PA-MOA (10mm) carb, with choke lever on carb.
Some ’79 and ’80, all 1981 had a Mikuni H9-10 (10mm) carb, choke lever on handlebar.

 

Tillotson Carburetor Parts (none)
Info on parts and service is now offered in the Carburetor/Mikuni and Tillotson section.

Keihin Carburetor Parts
Most Keihin carburetor parts for Indian are now offered in the Carburetor/Keihin section.

Mikuni Carburetor Parts
Some Mikuni carburetor parts for Indian are now offered in Carburetor/Mikuni and Tillotson.

 


2. Cover and Clutch

Section 2 – Cover and Clutch
 # qty price  Indian part#  description
u01 1 none   E511-00-50 right case cover
u02 1 $12.0 E930-00-50 clutch cover gasket
u0
3 1 $3.00 E314-00-50 sprocket distance collar
u0
4 1 $10.0 E537-00-50 dip stick
u05 1 $65.0 E310-00-50 drum & drive gear ??T
u0
6 1 $7.00 E315-00-50 clutch center guide
u0
7 1 $45.0 E312-00-50 starter friction plate
u0
8 1 none   E313-00-50 clutch assembly
u0
9 1 $12.0 E311-00-50 ball retainer
u
10 1 none   T108-54-50 driven gear 54T
u
11 1 none   T117-00-50 engage slider shaft
u
12 1 $3.00 E534-00-50 engage lever knob
u13 1 $2.00 H214-00-50 clutch nut M14x1
u
14 1 $3.00 H114-00-50 lock washer M14 spec
u
15 1 none   H117-00-50 thrust washer 17
u
16 1 none   E153-00-50 engage washer 5 x 30
u
17 3 $0.50 E316-00-50 starter balls Ø7.9 = 5/16″
u18 1 $5.00 E535-00-50 engage shaft seal 5x30x6
u
19 1 $1.00 E536-00-50 dip stick o-ring
u
20 2 $0.80 H662-00-50 phillips bolt M6 x 20
u
21 2 $1.00 H662-50-50 phillips bolt M6 x 25
u
22 1 $1.00 H663-20-50 phillips bolt M6 x 32(30)
u
23 5 $1.00 H667-50-50 phillips bolt M6 x 75
u
24 1 $1.20 H668-50-56 phillips bolt M6 x 85
u25 2 $3.00 E532-00-50 knock pin 8 x 12

 

Cylinder, piston, rings

Trans, clutch, cam parts

Clutch Parts

 

 

 

 

 

 

 

 

3. Valves and Camshaft

Section 3 – Valves and Cam
 # qty price  Indian part#  description
u01 1 none   E405-00-50 oil pump bush 17.5mm
u02 2 none   E406-00-50 set plate for bush
u03 1 $55.0 E401-00-50 cam w/sprocket 30T
u05 1 $16.0 E403-00-50 cam chain #25 x 42L
u06 2 none   E416-00-50 push rod ∅4.5 x 139
u07 2 $7.00 E417-00-50 rocker arm
u08 2 $5.00 E418-00-50 rocker arm pivot
u09 1 none   E404-00-50 chain tensioner
u10 1 none   E407-00-50 tensioner spring
u11 1 $15.0 E410-11-50 int. valve (same as ex)
11a 1 $17.0 14711-081-020 Honda int. valve
u12 1 $22.0 E410-12-50 ex. valve (same as in)

12a 1 $25.0 14721-081-020 Honda ex. valve
u13 2 $8.00 E411-00-50 lifter
u14 2 $8.00 E412-00-50 valve spring
u15 2 $2.00 E413-00-50 valve spring retainer
u16 4 none   E414-00-50 valve keeper (cotter)
u17 1 none   E415-00-50 push rod guide plate
u18 1 none   E430-00-50 oil pump inner rotor
u19 1 none   E431-00-50 oil pump outer rotor
u20 1 none   E432-00-50 oil pump shaft A
u21 1 none   E433-00-50 oil pump shaft B
u22 2 $5.00 E419-00-50 rocker bolt M6-0.50
u23 2 $8.00 E420-00-50 lock nut M6-0.50 x 4
u24 1 $0.20 H106-00-50 washer M6
u25 1 none   E434-00-50 oil pump washer
u26 1 $2.00 H161-70-50 wide washer M6 x 17
u
27 1 $0.80 H661-20-50 phillips bolt M6 x 12
u28 2 none   H661-40-50 phillips bolt M6 x 14
u29 1 $0.80 H661-50-50 phillips bolt M6 x 16

Head and valve parts

Head and valve parts

u30 1 $3.00 A610-23-50 spark plug NGK C7HS
u
31 2  $7.00 E511-00-50? valve seal ’80-81 with head 3d
u32 2 $7.00 E510-00-50 seal cup   ’80-81 with head 3d

Indian valve seals, only on head 3d

 

 

 

 

 

 

 

 

Valve guides: This simple head has no valve guides, just holes.

Valve seals: Most did not have valve seals #31. But some did. It was a later upgrade, not in the parts or service manuals. Indian engines with un-worn valve stem holes do not need seals. Indian’s relatives Honda PF50 and QR50 did not have them. But old engines with worn valve holes do need seals. Oil creeps down the valve stem, and is then burned. Burned 4-stroke oil smells, smokes, and blackens spark plugs.

 

 

 


4. Transmission Shafts

Section 4 – Transmission shafts
 # qty price  Indian part#  description

u01 1 none   T101-00-50 main shaft
u02 1 none   T102-00-50 counter shaft
u0
3 1 $19.0 T110-15-50 sprocket 15T used
0
3a 1 $24.0 T110-16-50 bigger sprocket 16T
0
3b 1 $140 T110-14-50 smaller sprocket 14T 
0
3c 1 none   T110-11-50 smallest sprocket 11T
u0
4 1 none   T103-00-50 engage push pin
u0
5 1 none   T104-00-50 engage coil spring
u0
6 1 $15.0 T111-29-50 pedal ratchet sprocket
u07 1 $40.0 T105-00-50 pedal shaft
u09 2 $4.00 T106-00-50 pedal ratchet pawl
u
10 2 $3.00 T107-00-50 pawl spring, orig steel (breaks often)
10a 2 none   T107-upgrade pawl spring, rubber
u
11 2 $1.00 H117-00-50 thrust washer Ø17
u
12 1 $1.00 H115-00-50 push pin washer Ø15
u13 4 $1.50 H120-00-50 pedal washer Ø20 x 30? 
u
14 3 $8.00 T114-00-50 counter shaft seal 20x30x6
u
15 5 $1.00 T115-10-50 circlip (snap ring) 20-outer
u
16 1 $1.00 T115-20-50 circlip (snap ring) 10-inner
u
17 1 $8.00 T116-00-50 bearing 6004, 20x42x12

White ratchet “springs” and trans parts.

 

 

 

Indian pedal ratchet pawl springs, early spring steel leaf type, often broke. That caused the pedals to freewheel both ways, but the engine could still be push-started. The upgrade springs for 1979-later were silicone rubber. The good thing is those never break. The bad thing is the pedal chain and ratcheting sprocket are trapped in the center of the engine cases, and cannot be serviced without engine removal and complete disassembling, with splitting of the crankcases. 

Indian front sprockets fit on many small Honda models, like early Honda 90, but not early Honda 50. They have 6 splines, 17mm inner by 20mm outer diameter. A normal Indian goes 27mph with a 15 tooth. With more power it could go 29mph with a 16T. With less power, or with quicker take-off, it could go 25mph with a 14T.

 


5. Piston and Crankshaft

Section 5 – Piston and crankshaft 
 # qty price  Indian part#  description

u01 1 none   E600-00-50 crankshaft complete
u02 1 $39.0 E660-00-50 ring set std 42.00
02a 1 $39.0 E660-10-50 ring set 1os 42.25
02b 1 none   E660-20-50 ring set 2os 42.50
02c 1 none   E660-30-50 ring set 3os 42.75
02d 1 none   E660-40-50 ring set 4os 43.00
u03 1 $43.0 E650-00-50 pist bare std 42.00 
03a 1 $45.0 E650-10-50 pist bare 1os 42.25  
03b 1 none   E650-20-50 pist bare 2os 42.50  
03c 1 none   E650-30-50 pist bare 3os 42.75  
03d 1 none   E650-40-50 pist bare 4os 43.00
03x 1 $78.0 6131 piston complete std 42.00  
3xa 1 $78.0 6132 piston complete 1os 42.25   
3xb 1 none   6133 piston complete 2os 42.50   
3xc 1 none   6134 piston complete 3os 42.75    
3xd 1 none   6135 piston complete 4os 43.00 

u04 1 $12.0 E651-00-50 piston pin ∅13 x 33
u05 2 $2.00 E652-00-50 piston pin clip ∅13
u06 1 none   E601-00-50 con. rod w/pin
u07 1 none   E602-00-50 roller retainer cage
u08 1 none   E603-10-50 right half of crank
u09 1 none   E603-20-50 left half of crank
u10 1 none   E604-00-50 crank pin
u11 1 $12.0 E610-15-50 timing sprocket 15T
u12 1 none   E605-00-50 sprocket pin ∅? x ?
u13 1 $7.00 E606-00-50 flywheel key 3x12.5×4.5
u14 20 none E607-00-50 rod bearing roller 2.5×8.5
u15 1 $7.00 E611-00-50 L crank seal 15x25x6
u16 1 $8.00 E608-00-50 L bearing 6202 15x35x11
u
17 1 $8.00 E609-00-50 R bearing 6203 17x40x12

 


6. Case and AC generator aka dynamo or magneto
Bosch 90mm compatible, made in Taiwan by WTEMCO
1978-79 had a 3-wire, 4-coil (3 for lights, 1 for ignition)
1980-81 had a 3-wire, 2-coil (1 for lights, 1 for ignition)

Section 6 – Case and Dynamo
 # qty price  Indian part#  description
u01 1 none   E512-00-50 right case half
u0
2 1 $7.00 E931-00-50 case center gasket
u0
3 1 none   E513-00-50 left case half 
u0
4 1 none   E521-00-50 dynamo cover maybe Sachs?
u0
5 1 $13.0 D110-00-50 3-piece points M19A

u0
6 1 none   D111-00-50 felt wiper
u0
7 1 $1.20 D112-00-50 points screw M4x10 phillips
u0
8 1 $0.20 D113-00-50 lock washer M4 
u0
9 1 $0.20 D114-00-50 washer M4
u
10 1 none   D115-00-50 ignition coil 4C blue
10a 1 none   D115-10-50 ignition coil 2C blue
u
11 1 none   D120-00-50 magneto 4C (4-coil) 
11a 1 none   D120-10-50 magneto 2C (2-coil) 
u
12 1 none   D117-00-50 flywheel WTEMCO
u
13 1 none   D116-00-50 ltg coils (3) 4C lt grn+yel
13a 1 none   D116-10-50 lighting coil 2C lt grn+yel
u
14 1 none   D118-00-50 rubber grommet
u
15 1 none   D119-00-50 clamp for cord
u
16 1 none   E538-00-50 sealing bolt M8x15
u
17 1 $2.00 H210-00-50 flywheel nut M10-1.25 
u
18 1 $1.00 E553-00-50 seal washer M12
u
19 1 $0.20 H000-00-50 washer M8
u
20 1 $1.00 D121-00-50 flywheel washer 10x?
u
21 1 $5.00 E531-00-50 drain plug M12-1.5×15
u
22 4 $0.50 H000-00-50 coil bolt M4 x 22(23) slot
u
23 3 $1.20 H000-00-50 case bolt M6x36(35) phil
u
24 1 $1.40 H000-00-50 case bolt M6 x 45 phil
u
25 4 $3.00 E532-00-50 knock pin 8 x 12mm
u
26 1 none   D122-00-50 back plate for 4-coil
26a 1 none   E122-00-50 back plate for 2-coil
u27 1 $11.0 H000-00-50 condenser M36
u28 3 $0.80 H000-00-50 stator screws M4x15

 

Indian 4-coil Magneto

Indian 4-coil Magneto

Indian 2-coil Magneto

Indian 2-coil Magneto

Magneto and ignition

 

 

 

 

 

 

 

The WTEMCO magneto is similar to a 90mm Bosch magneto, like on Puch mopeds. Many things interchange, like points, condenser, mounting plate. The original points are the older style 3-piece kind, identified by the e-clip. By removing the screw-in post, newer style one-piece Bosch points will replace the older 3-piece ones. The WTEMCO flywheel timing angle is close to Tomos, which is different than Puch.