Parts Diagram | ## | Part # | Description | Qty | Notes |
| 1 | 0433418 | Cylinder & crankcase assembly. 3R models only | 1 | |
1 | 0433940 | Cylinder & crankcase assembly. 4R models only | 1 | |
2 | 0333676 | Screw, cylinder. to crankcase, 1 1/4 in. long | 6 | |
3 | 0304067 | Plug, large | 1 | |
4 | 0307588 | Plug, small | 1 | |
5 | 0333710 | Screw, short, 1 in. long | 2 | |
6 | 0332099 | Tube, drain, upper 1.3 in. long | 1 | |
7 | 0332100 | Tube, drain, lower 0.8 in. long | 1 | |
8 | 0300402 | Taper pin | 1 | |
9 | 0323522 | Hose, water deflector, 11/16 in | 1 | |
10 | 0334844 | Screw, long, 2 1/4 in. length | 2 | |
11 | 0305344 | Screen, check valve | 1 | |
12 | 0385111 | Check valve assembly | 1 | |
13 | 0333676 | Screw, cylinder head | 6 | |
14 | 0332226 | Screw, cover plate | 9 | |
15 | 0304015 | Screw, inner flange | 4 | |
16 | 0336984 | Lower housing | 1 | |
17 | 0387633 | Spark plug, Champion QL77JC4 | 2 | |
18 | 0323263 | Plate, exhaust cover | 1 | |
19 | 0323445 | Gasket, cover plate | 1 | |
20 | 0320107 | Tie strap. 3R models only | 2 | |
21 | 0331526 | Hose, pulse. 3R models only | 1 | |
22 | 0326544 | Nipple, pulse. 3R models only | 1 | |
23 | 0303107 | Washer, pulse nipple. 3R models only | 1 | |
24 | 0335841 | Cylinder head | 1 | |
25 | 0332010 | Gasket, cylinder head | 1 | |
26 | 0433426 | Powerhead gasket set | 1 | |