Parts Diagram | ## | Part # | Description | Qty | Notes |
| 1 | 0334218 | Screw, spark adjustment | 1 | |
2 | 0335687 | Screw, crankcase head | 14 | |
3 | 0393620 | Crankcase head and bearing. assembly | 1 | |
4 | 0339620 | Seal, upper | 1 | |
5 | 0326765 | Retaining ring | 8 | |
6 | 0434772 | Crank shaft assembly | 1 | |
7 | 0337087 | O-ring, sleeve | 1 | |
8 | 0336988 | Sleeve, crank shaft | 1 | |
9 | 0326047 | Ring, retaining, bearing | 1 | |
10 | 0326748 | Plate, lower bearing | 1 | |
11 | 0390641 | Bearing, ball | 1 | |
12 | 0434792 | Crankcase head assembly | 1 | |
13 | 0332942 | Seal | 1 | |
14 | 0332590 | Screw, lower bearing retainer | 4 | |
14a | 0332585 | Rubber washer | 1 | |
15 | 0387041 | Retainer & needle set | 1 | |
16 | 0326749 | Seal ring | 6 | |
17 | 0434844 | Bearing, wrist pin | 4 | |
18 | 0394488 | Connecting rod assembly. "K" suffix models | 4 | |
18 | 0435355 | Connecting rod assembly. "c, E, M, r" suffix models | 4 | |
19 | 0330081 | Screw, rod cap | 2 | |
20 | 0396041 | Retainer set | 4 | |
21 | 0320499 | Split sleeve, center bearing | 1 | |
22 | 0431870 | Ring set, standard | 4 | |
22 | 0431844 | Ring set, 0.030 in. o. s | 4 | |
23 | 0432970 | Piston, starboard, standard | 2 | |
23 | 0433004 | Piston, starboard, 0.030 in. o. s | 2 | |
23 | 0432969 | Piston, port, standard | 2 | |
23 | 0433003 | Piston, port, 0.030 in. o. s | 2 | |
24 | 0326764 | Wrist pin | 4 | |
25 | 0302290 | Lock washer, spark adjustment | 1 | |
26 | 0328740 | Nut, spark adjustment | 1 | |
27 | 0314416 | Bumper, spark adjustment | 1 | |
28 | 0316487 | Retainer, bearing head | 2 | |
29 | 0334317 | Stop bracket | 1 | |
30 | 0318660 | Cap | 1 | |
31 | 0203688 | Nut, screw | 1 | |
32 | 0317581 | Screw, idle stop bracket | 2 | |
33 | 0331635 | Screw, stop bracket | 1 | |
34 | 0308993 | Spring | 1 | |
35 | 0326741 | O-ring | 4 | |
36 | 0307480 | Key, flywheel | 1 | |