| Item | Part No. | Part Name | Qty | Serial No. |
| 6131-11-1001 | CYLINDER HEAD ASS'Y,WITH VALVE | | 18273- |
| \0\6131-11-1000 | CYLINDER HEAD ASS'Y,WITH VALVE | | 18273-39999 |
| 6131-11-1201 | CYLINDER HEAD ASS'Y,VALVE LESS | | 18273- |
| \0\6131-11-1200 | CYLINDER HEAD ASS'Y,VALVE LESS | | 18273-39999 |
| 1 | \6\ | HEAD,CYLINDER | | 18273- |
| 2 | 6130-11-1131 | SLEEVE | | 18273- |
| 3 | 6130-11-1310 | GUIDE,VALVE | | 18273- |
| 4 | 6130-11-1323 | SEAT,EXHAUST VALVE (STD) | | 18273- |
| 4 | 6130-19-1323 | SEAT, 0.25MM,EXHAUST VALVE (OS) | | 18273- |
| 4 | 6130-18-1323 | SEAT, 0.50MM,EXHAUST VALVE (OS) | | 18273- |
| 4 | 6130-17-1323 | SEAT, 0.75MM,EXHAUST VALVE (OS) | | 18273- |
| 4 | 6130-16-1323 | SEAT, 1.00MM,EXHAUST VALVE (OS) | | 18273- |
| 5 | 6131-12-1310 | SEAT,INTAKE VALVE (STD) | | 18273- |
| 5 | (\2\6131-11-1312) | SEAT,INTAKE VALVE (STD) | | (21997-39999) |
| 5 | (\2\6131-11-1311) | SEAT,INTAKE VALVE (STD) | | (18273-21996) |
| 5 | 6131-19-1310 | SEAT, 0.25MM,INTAKE VALVE (OS) | | 18273- |
| 5 | (\2\6131-19-1312) | SEAT, 0.25MM,INTAKE VALVE (OS) | | (21997-39999) |
| 5 | (\2\6131-19-1311) | SEAT, 0.25MM,INTAKE VALVE (OS) | | (18273-21996) |
| 5 | 6131-18-1310 | SEAT, 0.50MM,INTAKE VALVE (OS) | | 18273- |
| 5 | (\2\6131-18-1312) | SEAT, 0.50MM,INTAKE VALVE (OS) | | (21997-39999) |
| 5 | (\2\6131-18-1311) | SEAT, 0.50MM,INTAKE VALVE (OS) | | (18273-21996) |
| 5 | 6131-17-1310 | SEAT, 0.75MM,INTAKE VALVE (OS) | | 18273- |
| 5 | (\2\6131-17-1312) | SEAT, 0.75MM,INTAKE VALVE (OS) | | (21997-39999) |
| 5 | (\2\6131-17-1311) | SEAT, 0.75MM,INTAKE VALVE (OS) | | (18273-21996) |
| 5 | 6131-16-1310 | SEAT, 1.00MM,INTAKE VALVE (OS) | | 18273- |
| 5 | (\2\6131-16-1312) | SEAT, 1.00MM,INTAKE VALVE (OS) | | (21997-39999) |
| 5 | (\2\6131-16-1311) | SEAT, 1.00MM,INTAKE VALVE (OS) | | (18273-21996) |
| 6 | 6130-11-1931 | PLATE | | 21532- |
| 6 | \0\6130-11-1930 | PLATE | | 18273-21531 |
| 7 | 6130-11-1940 | GASKET (K1) | | 18273- |
| 8 | 01010-30816 | BOLT | | 18273- |
| 9 | 01602-00825 | WASHER,SPRING | | 18273- |
| 10 | 6130-11-1410 | PLUG | | 18273- |
| 11 | 6130-11-1420 | PLUG | | 18273- |
| 12 | 6100-21-1130 | PLUG | | 18273- |
| 13 | 6130-11-1451 | NOZZLE | | 18273- |
| 14 | 01140-61035 | STUD | | 18273- |
| 15 | 6131-42-4120 | VALVE,INTAKE | | 18273- |
| 15 | 6131-42-4110 | VALVE,INTAKE | | 18273- |
| 15 | (\2\6130-41-4121) | VALVE,INTAKE | | (.-39999) |
| 15 | (\2\6130-41-4120) | VALVE,INTAKE | | (18273-.) |
| 16 | 6130-41-4210 | VALVE,EXHAUST | | 18273- |
| 17 | 6130-41-4410 | SPRING,VALVE | | 18273- |
| 18 | 6130-41-4511 | GUIDE,SPRING | | .- |
| 18 | \0\6130-41-4510 | GUIDE,SPRING | | 18273-. |
| 19 | 6130-41-4520 | COTTER | | 18273- |
| 20 | 6130-41-4541 | SEAL,VALVE STEM (K1) | | 18273- |
| 21 | 6130-41-4610 | COIL | | 18273- |
| 22 | 6131-11-1810 | GASKET (K1) | | 18273- |
| 23 | 6130-11-1611 | BOLT | | 18273- |
