| Item | Part No. | Part Name | Qty | Serial No. |
| (257-20-21500) | ENGINE ASS'Y | 1501- | ||
| 1 | KT15521-2111-1 | PISTON | 1501- | |
| 2 | KT15521-2105-1 | PISTON RING ASS'Y | 1501- | |
| 3 | KT15521-2131-1 | PIN,PISTON | 1501- | |
| 4 | KT15221-2133-1 | RING,SNAP | 1501- | |
| KT15471-2201-2 | CONNECTING ROD A. | 1501- | ||
| 5 | KT15521-2211-2 | ROD,CONNECTING | 1501- | |
| 6 | KT15221-21362 | BUSHING | 1501- | |
| 7 | KT15521-2214-1 | BOLT | 1501- | |
| 8 | KT15471-2231-1 | METAL,CRANK PIN | 1501- | |
| KT15527-2301-1 | CRANKSHAFT ASS'Y | 1501- | ||
| 9 | KT15521-2311-2 | CRANKSHAFT | 1501- | |
| 10 | KT15221-3363-1 | PLUG | 1501- | |
| 11 | KT19202-2328-3 | SLEEVE | 1501- | |
| 12 | KT15521-2411-1 | GEAR,CRANKSHAFT | 1501- | |
| 13 | KT05712-00720 | KEY | 1501- | |
| 14 | KT15594-2413-1 | COLLAR | 1501- | |
| 15 | KT15221-2331-2 | SPACER | 1501- | |
| 16 | KT19202-2325-1 | COLLAR | 1501- | |
| 17 | KT04811-10300 | O-RING | 1501- | |
| 18 | KT15221-2336-1 | NUT | 1501- | |
| 19 | KT15221-2338-1 | WASHER | 1501- | |
| 20 | KT15221-2347-1 | METAL,CRANKSHAFT | 1501- | |
| 21 | KT15221-2348-1 | METAL,CRANKSHAFT | 1501- | |
| 22 | KT15221-2353-1 | METAL | 1501- | |
| 23 | KT15521-2354-1 | METAL | 1501- | |
| 24 | KT09550-00001 | SEAL,OIL | 1501- |