| Item | Part No. | Part Name | Qty | Serial No. |
| (257-20-21500) | ENGINE ASS'Y | 1501- | ||
| 1 | KT15221-1555-1 | TAPPET | 1501- | |
| 2 | KT15221-1511-2 | ROD,PUSH | 1501- | |
| KT15521-1601-2 | CAMSHAFT ASS'Y | 1501- | ||
| 3 | KT15521-1615-2 | CAMSHAFT | 1501- | |
| 4 | KT15521-9361-3 | SCREW | 1501- | |
| 5 | KT15521-1651-1 | GEAR,CAMSHAFT | 1501- | |
| 6 | KT05712-00720 | KEY | 1501- | |
| 7 | KT15221-1627-3 | STOPPER | 1501- | |
| 8 | KT01123-50818 | BOLT | 1501- | |
| KT15221-2401-1 | IDLER GEAR ASS'Y | 1501- | ||
| 9 | KT15221-3421-3 | GEAR,IDLER | 1501- | |
| 10 | KT15221-2498-1 | BUSHING | 1501- | |
| 11 | KT15521-2436-1 | COLLAR | 1501- | |
| 12 | KT15521-2437-1 | COLLAR | 1501- | |
| 13 | KT15221-2432-1 | RING,SNAP | 1501- | |
| 14 | KT15221-2425-5 | SHAFT | 1501- | |
| 15 | KTO1123-50818 | BOLT | 1501- |