| Item | Part No. | Part Name | Qty | Serial No. |
| 6138-12-1100 | CYLINDER HEAD ASS'Y,VALVE LESS | | 56997- |
| 1 | \6\ | HEAD,CYLINDER | | 56997- |
| 2 | 6136-11-1130 | SLEEVE,HOLDER | | 56997- |
| 3 | 6138-12-1310 | SEAT,INTAKE VALVE (STD) | | 56997- |
| 3 | 6138-19-1310 | SEAT, 0.25MM,INTAKE VALVE (OS) | | 56997- |
| 3 | 6138-18-1310 | SEAT, 0.50MM,INTAKE VALVE (OS) | | 56997- |
| 3 | 6138-17-1310 | SEAT, 0.75MM,INTAKE VALVE (OS) | | 56997- |
| 3 | 6138-16-1310 | SEAT, 1.00MM,INTAKE VALVE (OS) | | 56997- |
| 4 | 6136-12-1320 | SEAT,EXHAUST VALVE (STD) | | 56997- |
| 4 | 6136-19-1420 | SEAT, 0.25MM,EXHAUST VALVE (OS) | | 56997- |
| 4 | 6136-18-1420 | SEAT, 0.50MM,EXHAUST VALVE (OS) | | 56997- |
| 4 | 6136-17-1420 | SEAT, 0.75MM,EXHAUST VALVE (OS) | | 56997- |
| 4 | 6136-16-1420 | SEAT, 1.00MM,EXHAUST VALVE (OS) | | 56997- |
| 5 | 6136-19-1430 | GUIDE,VALVE | | 56997- |
| 6 | 07046-42816 | PLUG | | 56997- |
| 7 | 07046-44016 | PLUG | | 56997- |
| 8 | 07043-50108 | PLUG | | 56997- |
| 9 | 6138-42-4110 | VALVE,INTAKE | | 56997- |
| 10 | 6136-42-4210 | VALVE,EXHAUST | | 56997- |
| 11 | 6136-42-4410 | SPRING,VALVE | | 56997- |
| 12 | 6136-42-4510 | GUIDE,SPRING | | 56997- |
| 13 | 6136-42-4520 | COTTER,VALVE | | 56997- |
| 14 | 6136-41-4530 | SEAT,SPRING | | 56997- |
| 15 | 6138-19-1811 | GASKET,HEAD (K1) | | 67511- |
| 15 | \0\6138-19-1810 | GASKET,HEAD (K1) | | 56997-67510 |
| 16 | 6136-12-1610 | BOLT | | 56997- |
| 17 | 6136-11-1910 | HANGER,FRONT | | 56997- |
| 18 | 6136-11-1840 | GASKET (K1) | | 66918- |
| 18 | \0\6136-11-1821 | GASKET (K1) | | 56997-66917 |
| 19 | 6136-11-1920 | HANGER,REAR | | 56997- |
| 20 | 01435-01020 | BOLT | | 60925- |
| 20 | 01010-31020 | BOLT | | 56997-60924 |
| 21 | 01602-01030 | WASHER,SPRING | | 56997-60924 |
