Crankshaft

Ref.

Part Number

Description

Per

Year

Model

1

40-0162

Nut rocker spindle (domed 3/8 B.S.C.) 2 1971-73 All B50

2

942-48

Copper washer – oil feed union 2 1973 All B50

3

41-0807

Rocker oil feed pipe 1 1971-73 All B50

4

942-48

Copper washer – oil feed union 2 1973 All B50

5

19-7625

Spark plug cover 1 1971-73 All B50

6

19-7606

Spark plug 1 1971-73 B50 MX

6

19-7616

Spark plug 1 1971-72 B50 T SS H

7

24-563

Nut – rocker adjusting screw ( 5/16 B.S.C.) 2 1971-73 All B50

8

68-0155

Rocker adjusting screw ( 5/16 B.S.C.)  2 1971-73 All B50

9

70-1330

Washer 2 1973 All B50

10

40-0296

Exhaust rocker complete 1 1971-73 All B50

11

40-0292

Inlet rocker complete 1 1971-73 All B50

12

40-0158

Thrust washer – rocker spindle (3/8) 2 1971-73 All B50

13

40-0148

0 ring – rocker spindle 2 1971-73 All B50

14

14-0302

Nut, Cylinder Base 2 1971-73 All B50

15

70-8215

Washer (21/64 X 9/16 X 3/32 ) 2 1973 All B50

16

21-2034

Cylinder stud ( 5/16 UN.C./UN.F. 3 1/8 ) 2 1971-73 All B50

17

71-1635

Connecting rod complete 1 1971-73 All B50

18

66-0492

Small-end bush – connecting rod 1 1971-73 All B50

19

66-0953

Gudgeon pin 1 1971 All B50

20

71-1616

Crankpin 1 1971-73 All B50

21

41-0588

Crankpin nut 2 1971-73 All B50

22

71-1199

Big-end bush 1 1971-73 All B50

23

41-0551

Peg crankpin location 1 1971-73 All B50

24

71-1681

Engine shaft – right 1 1971-73 All B50

25

71-1677

Flywheel complete right 1 1971-73 All B50

26

71-1678

Flywheel plug 1 1971-73 All B50

27

71-1676

Flywheel complete left 1 1971-72 All B50

28

71-1632

Engine shaft – left 1 1971-73 All B50

29

66-0954

Circlip, Gudgeon pin 2 1971-73 All B50

30

19257/STD

Piston complete (standard) 1 1972 All B50

30

19257/20

Piston complete +.020 1 1972 All B50

30

19257/40

Piston complete +.040 1 1972 All B50

30

19257/60

Piston complete +.060 1 1972 All B50

31

70-7850

Needle roller – big-end bearing 1 1971-73 All B50

32

71-1624

Cylinder base washer 1 1971-73 All B50

33

71-1219

Cylinder barrel 1 1971-73 All B50

34

R26510/STD

Piston Ring Set (3) Standard 1 1971-73 All B50

34

R26510/20

Piston Ring Set (3) +.020 1 1971-73 All B50

34

R26510/40

Piston Ring Set (3) +.040 1 1971-73 All B50

34

R26510/60

Piston Ring Set (3) +.060 1 1971-73 All B50

37

71-2549

Peg -cylinder liner 1 1972-73 All B50

38

71-1218

Liner -cylinder barrel 1 1972 All B50

39

21-2033

Stud, Cylinder Holding 4 1971-73 All B50

40

41-0639

Washer cylinder barrel stud 4 1971-73 All B50

41

14-0304

Nut cylinder barrel stud (7/16 UN.F) 4 1971-73 All B50

42

71-1625

Cylinder head gasket 4 1971-73 All B50

43

40-0294

Rocker spindle inlet and exhaust 4 1971-73 All B50

42

40-0156

Spring washer – rocker spindle 1 1971-72 All B50

44

70-1574

Spring washer – rocker spindle 2 1973 All B50

Not illustrated

40-0862

Circlip -crankshaft oil seal 1 1971-72 All B50

Not illustrated

70-8157

Circlip -crankshaft oil seal 1 1973 All B50

Not illustrated

71-1631

Spacer -crankcase bearing 1 1971-73 All B50

Not illustrated

71-2546

Circlip -crankcase bearing 1 1971 All B50

Not illustrated

71-2586

Connecting rod and crankpin assembly 1 1971-73 All B50
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