Gear Cluster

Ref.

Part Number

Description

Per

Year

Model

1

40-0394

Dowel -inner cover to crankcase 2 1971-73 All B50

2

29-3857

Mainshaft bearing 2 1971-73 All B50

3

57-3872

Pinion – mainshaft top gear (22 teeth) 1 1971-73 All B50

4

40-3020

Spacer (.093-.094 ) 1 1971-73 All B50

4

40-3126

Spacer ( .098-.099 ) AR 1971-73 All B50

4

40-3127

Spacer (.103-.104 ) AR 1971-73 All B50

5

57-3876

Pinion -layshaft second gear (21 teeth) AR 1971-73 All B50

6

40-3019

Spacer (.075-.076 ) 1 1971-73 All B50

6

40-3119

Spacer ( .070-.071 ) 1 1971-73 All B50

6

40-3120

Spacer (.080-.081 ) 1 1971-73 All B50

7

57-2662

Pinion -mainshaft third gear (24 teeth) 1 1973 All B50

7

57-4665

Gear -mainshaft third (24 teeth) 1 1971-73 B50 MX

8

41-3065

Pinion -mainshaft first gear (18 teeth) 1 1971-72 B50 MX

8

57-2663

Pinion- mainshaft first gear (16 teeth) 1 1971-73 B50 T SS H

9

40-3007

Mainshaft bush -push rod 1 1971-73 All B50

10

57-4682

Mainshaft ( complete with 18T gear) 1 1973 B50 MX

10

57-4344

Mainshaft with bush 1 1971-72 All B50

11

40-3258

Layshaft shim 1 1971-73 All B50

12

40-3262

Bush -layshaft first gear 1 1971-73 All B50

13

41-3073

Pinion -layshaft first gear (25 teeth) 1 1971-73 B50 MX

13

57-3874

Pinion -layshaft first gear (27 teeth) 1 1971-72 B50 T SS H

14

57-3877

Pinion -layshaft third gear (19 teeth) 1 1971-73 All B50

15

41-3078

Layshaft circlip 1 1971-73 All B50

16

41-3070

Pinion -layshaft second gear (22 teeth) 1 1971-73 All B50

17

41-3068

Layshaft with top gear (14 teeth) 1 1971-73 All B50

18

41-3072

Thrust washer ( .078-.080 ) AR 1971-73 All B50

18

41-3074

Thrust washer ( .083-.085 ) AR 1971-73 All B50

19

40-3292

Bearing, needle roller, layshaft 1 1971-73 All B50

20

40-3265

Clutch push rod 1 1971-73 All B50

21

41-3045

Bush – mainshaft top gear 2 1971-73 All B50

22

71-1271

Shield -gearbox main bearing 1 1971-73 All B50

23

41-3054

Mainshaft oil seal 1 1971-73 All B50

24

70-6026

Circlip -mainshaft oil seal 1 1971-73 All B50

25

71-2547

Dowel -crankcase inner cover 1 1971-73 All B50

Not illustrated

37-3932

Distance piece – front wheel spindle, inner side right bearing 1971-72 B50 SS H

Not illustrated

37-1237

Grease retainer -left, outer 1971-73 B50 T MX

Not illustrated

37-3758

Locknut (25/64 x 3/4 x 3/64 ) 1971 B50 T MX

Not illustrated

42-5836

Pivot pin – front brake cable to lever 1971-73 B50 T MX

Not illustrated

60-2632

Circlip – grease retainer, right 1971-73 B50 T MX

Not illustrated

60-3152

Gaiter – front brake cable 1971 B50 T MX

Not illustrated

65-5904

Brake shoe spring 1971-72 B50 T MX
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