Parts Diagram | ## | Part # | Description | Qty | Notes |
| 1 | 0397487 | Piston, standard | 2 | |
1 | 0396574 | Piston, 0.030 o. s. includes piston rings | 2 | |
2 | 0386279 | Ring set, standard | 2 | |
2 | 0386280 | Ring set, 0.030 o. s | 2 | |
3 | 0325296 | Wrist pin | 2 | |
4 | 0325262 | Retaining ring | 4 | |
5 | 0393283 | Bearing, wrist pin | 2 | |
6 | 0396607 | Connecting rod assembly | 2 | |
7 | 0304610 | Screw, rod cap | 2 | |
8 | 0385173 | Bearing assembly, crank shaft, lower | 1 | |
9 | 0395401 | Bearing set | 2 | |
10 | 0124341 | Screw, crankcase head | 3 | |
11 | 0394327 | Crankcase head & seal assembly | 1 | |
12 | 0321831 | Seal, upper | 1 | |
13 | 0321788 | Seal, lower | 1 | |
14 | 0318641 | Retaining ring, ball bearing | 1 | |
15 | 0321830 | Seal, crank shaft | 1 | |
16 | 0329421 | Crank shaft | 1 | |
17 | 0318931 | Key, crank shaft | 1 | |
18 | 0308458 | O-ring, crankcase head | 1 | |
19 | 0318863 | Split sleeve, center bearing | 1 | |
20 | 0386008 | Bearing assembly, crank shaft | 1 | |
21 | 0305981 | Washer, screw, crankcase head | 3 | |
22 | 0393804 | Bearing assembly, center | 1 | |
23 | 0328792 | Washer, wrist pin | 4 | |