| Item | Part No. | Part Name | Qty | Serial No. |
| YM121500-22090 | PISTON ASS'Y | 01001- | ||
| 1 | \6\ | PISTON | 01001- | |
| YM721500-22500 | PISTON RING ASS'Y | 01001- | ||
| 2 | \6\ | RING,TOP | 01001- | |
| 3 | \6\ | RING,SECOND | 01001- | |
| 4 | \6\ | RING,OIL | 01001- | |
| 5 | YM104200-22300 | PIN | 01001- | |
| 6 | YM172100-22400 | CIRCLIP | 01001- | |
| YM721550-23100 | CONNECTING ROD A. | 01001- | ||
| 7 | YM121550-23010 | ROD | 01001- | |
| 8 | YM124060-23100 | METAL | 01001- | |
| 9 | YM721550-23600 | METAL ASS'Y,CRANK PIN | 01001- | |
| \6\ | METAL | 01001- | ||
| 10 | YM121550-23200 | BOLT | 01001- |