| Item | Part No. | Part Name | Qty | Serial No. |
| (257-20-21500) | ENGINE ASS'Y | 1501- | ||
| 1 | KT15221-1311-4 | VALVE,INLET | 1501- | |
| 2 | KT15221-1312-4 | VALVE,EXHAUST | 1501- | |
| 3 | KT15221-1324-4 | SPRING | 1501- | |
| 4 | KT15221-1333-2 | RETAINER | 1501- | |
| 5 | KT15221-1336-1 | COLLET | 1501- | |
| 6 | KT15221-1315-2 | SEAL | 1501- | |
| 7 | KT15221-1328-2 | CAP,VALVE | 1501- | |
| KT15321-1405-1 | ROCKER ARM SHAFT A. | 1501- | ||
| 8 | KT15321-1426-2 | SHAFT | 1501- | |
| 9 | KT03410-50808 | SCREW | 1501- | |
| 10 | KT15221-1435-1 | BRACKET | 1501- | |
| 11 | KT15521-9150-1 | STUD | 1501- | |
| 12 | KT02156-50080 | NUT | 1501- | |
| 13 | KT04512-50080 | WASHER,SPRING | 1501- | |
| 14 | KT04012-50080 | WASHER | 1501- | |
| 15 | KT15221-1442-1 | SCREW | 1501- | |
| 16 | KT15221-1443-1 | WASHER | 1501- | |
| 17 | KT15221-1431-2 | SPRING | 1501- | |
| 18 | KT04612-00140 | RING,SNAP | 1501- | |
| KT15601-1403-1 | ROCKER ARM ASS'Y | 1501- | ||
| 19 | KT15221-1411-1 | ARM,ROCKER | 1501- | |
| 20 | KT15221-1418-1 | BUSHING | 1501- | |
| 21 | KT15521-1423-1 | SCREW | 1501- | |
| 22 | KT15021-1424-1 | NUT | 1501- |