| Item | Part No. | Part Name | Qty | Serial No. |
| 6142-11-1004 | CYLINDER HEAD A.,WITH VALVE | | 31228- |
| 6142-11-1104 | CYLINDER HEAD A.,VALVE LESS | | 31228- |
| 1 | \6\ | HEAD,CYLINDER | | 31228- |
| 2 | 6142-12-1140 | PIPE | | 31228- |
| 3 | 07046-41410 | PLUG | | 31228- |
| 4 | 07046-42516 | PLUG | | 31228- |
| 5 | 6142-11-1310 | GUIDE,VALVE | | 31228- |
| 6 | 6142-11-1410 | SEAT,INTAKE (STD) | | 31228- |
| 6142-19-1430 | SEAT¤ 0.25MM,INTAKE (OS) | | 31228- |
| 6142-18-1430 | SEAT¤ 0.50MM,INTAKE (OS) | | 31228- |
| 7 | 6142-11-1420 | SEAT,EXHAUST (STD) | | 31228- |
| 6142-19-1440 | SEAT¤ 0.25MM,EXHAUST (OS) | | 31228- |
| 6142-18-1440 | SEAT¤ 0.50MM,EXHAUST (OS) | | 31228- |
| 9 | 6140-41-4111 | VALVE,INTAKE | | 31228- |
| 10 | 6140-41-4211 | VALVE,EXHAUST | | 31228- |
| 11 | 6140-41-4410 | SPRING,VALVE | | 31228- |
| 12 | 6140-41-4511 | SEAT,SPRING | | 31228- |
| 13 | 6140-41-4520 | COTTER | | 31228- |
| 14 | 6140-41-4530 | ROTATOR | | 31228- |
| 15 | 6140-41-4540 | SEAL,VALVE (K1) | | 31228- |
| 16 | 6142-12-1810 | GASKET,HEAD (K1) | | 31228- |
| 17 | 6142-11-1610 | BOLT,HEAD | | 31228- |
| 18 | 6142-11-8211 | HANGER | | 31228- |
| 19 | 01010-30816 | BOLT | | 31228- |
| 20 | 01602-00825 | WASHER,SPRING | | 31228- |
| 21 | 6142-11-8221 | HOOK | | 31228- |
| 22 | 01010-31220 | BOLT | | 31228- |
| 23 | 01602-01236 | WASHER,SPRING | | 31228- |
