| Item | Part No. | Part Name | Qty | Serial No. |
| STANDARD | ||||
| 1 | YM105150-22090 | PISTON ASS'Y | 2991- | |
| YM105170-22090 | PISTON ASS'Y | 2501-2990 | ||
| 2 | YM705170-22501 | PISTON RING ASS'Y | 2991- | |
| YM705170-22500 | PISTON RING ASS'Y | 2501-2990 | ||
| OVERSIZE 0.25MM | ||||
| 1 | YM105100-22471 | PISTON ASS'Y | 2991- | |
| 2 | YM105100-22510 | PISTON RING ASS'Y | 2991- | |
| OVERSIZE 0.50MM | ||||
| 1 | YM105100-22481 | PISTON ASS'Y | 2991- | |
| 2 | YM105100-22520 | PISTON RING ASS'Y | 2991- | |
| 3 | YM119810-22300 | PIN | 2501- | |
| 4 | YM105100-22400 | RING,SNAP | 2501- | |
| 5 | YM705100-23100 | ROD,CONNECTING | 2501- | |
| 6 | YM105100-23910 | BUSHING | 2991- | |
| YM105100-23100 | BUSHING | 2501-2990 | ||
| 7 | YM705100-23600 | METAL ASS'Y | 2501- | |
| YM705100-23610 | METAL ASS'Y¤ 0.25MM (US) | 2501- | ||
| YM705100-23620 | METAL ASS'Y¤ 0.50MM (US) | 2501- | ||
| 8 | YM105300-23200 | BOLT | 2501- |