Clutch & Chain
Key | Part Number | Description | Per | Year | Model |
NI | PACK-INTER-004 | Chain pack | A | All | All |
NI | PACK-INTER-005 | 3 spring / 4 spring clutch pack | A | All | All |
1 | 57-2166 | Inspection plug, primary cover | 1 | 1971-73 | All B50 |
2 | 70-8782 | Washer, inspection plugs | 2 | 1971-73 | All B50 |
3 | 70-9800 | Inspection plug, primary cover, vented (add your own hole!) | 1 | 1971-73 | All B50 |
4 | 76-4116 | Screw, inspection cover | 4 | 1971-73 | All B50 |
5 | 68-0839 | Timing inspection cover | 1 | 1971-73 | All B50 |
6 | 71-1420 | Gasket, inspection cover | 1 | 1971-73 | All B50 |
7 | 40-1005 | Ignition timing pointer | 1 | 1971-73 | All B50 |
8 | 83-4122 | Breather pipe | 1 | 1972 | All B50 |
8 | 83-5115 | Breather pipe (long) | 1 | 1973 | B50 MX |
9 | 60-2252 | Clip – breather pipe | 1 | 1972-73 | All B50 |
10 | 71-2927 | Stub – breather outlet | 1 | 1972-73 | All B50 |
11 | 14-6610 | Case Screw, 1/4 x 1 1/2″ | 8 | 1971-73 | All B50 |
12 | 60-3745 | Filter- breather pipe | 1 | 1972-73 | All B50 |
13 | 71-2025 | Primary chain case cover | 1 | 1971-73 | All B50 |
14 | 21-1951 | Case screw, dowel hole (1/4 UNC x 1 7/8 ) | 2 | 1969- | All B50 |
14 | 21-2153 | Case screw, dowel holes (1/4 UNC x 139/64 ) | 2 | 1972-73 | All B50 |
15 | 66-3074 | Dowel | 2 | 1971-73 | All B50 |
16 | 57-4019 | Clutch pressure plate | 1 | 1971-73 | All B50 |
17 | 57-2725 | Plain clutch plate | 5 | 1971-73 | All B50 |
18 | 57-2726 | Friction clutch plate | 5 | 1971-73 | All B50 |
19 | 40-3234 | Spacing washer, clutch nut | 1 | 1971-73 | All B50 |
20 | 40-3221 | Lockwasher -clutch retaining nut | 1 | 1971-73 | All B50 |
21 | 40-3227 | Clutch retaining nut (1/2 B.S.C.) | 1 | 1971-73 | All B50 |
22 | 14-0401 | Nut, pushrod adjusting (1/4 UN.F.) | 1 | 1971-73 | All B50 |
23 | 57-4189 | Screw, pushrod adjusting (1/4 UN.F. x 5/8 ) | 1 | 1971-73 | All B50 |
24 | 57-4121 | Spring cup | 4 | 1971-73 | All B50 |
25 | 21-1943 | Drain plug, primary case | 1 | 1971-73 | All B50 |
26 | 41-3091 | Clutch spring | 4 | 1971-73 | All B50 |
27 | 41-3215 | Clutch spring nut | 4 | 1971-73 | All B50 |
28 | 71-1065 | Washer, oil level screw | 1 | 1971-73 | All B50 |
29 | 14-7804 | Screw, oil level | 1 | 1971-73 | All B50 |
30 | 41-3212 | Rubber pad, shock absorber | 8 | 1971-73 | All B50 |
31 | 19-8683 | Primary chain (72 pitches) | 1 | 1971-73 | All B50 |
32 | 40-3206 | Clutch roller (3/16 X 3/16 ) | 25 | 1971-73 | All B50 |
33 | 71-1418 | Gasket, primary cover | 1 | 1971-73 | All B50 |
34 | 57-4200 | Clutch hub | 1 | 1971-73 | All B50 |
35 | 40-3150 | Key, clutch hub | 1 | 1971-73 | All B50 |
36 | 57-3931 | Thrust washer | 1 | 1971-73 | All B50 |
37 | 57-4303 | Chainwheel | 1 | 1971-73 | All B50 |
38 | 40-3207 | Retaining plate -inner | 1 | 1971-73 | All B50 |
39 | 57-4186 | Clutch centre | 1 | 1971 | All B50 |
39 | 57-4531 | Clutch centre assembly | 1 | 1972-73 | B50 MX |
39 | 57-4511 | Clutch centre | 1 | 1972-73 | All B50 |
40 | 41-3209 | Clutch spider | 1 | 1971-73 | All B50 |
41 | 40-3210 | Retaining plate- outer | 1 | 1971-73 | All B50 |
42 | 40-3330 | Screw, inner and outer retaining plates (1 B.A. x 15/16) | 4 | 1971 | All B50 |
42 | 57-4507 | Rivet, inner and outer retaining plates | 4 | 1972-73 | All B50 |
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