| Item | Part No. | Part Name | Qty | Serial No. |
| 1 | YM129100-22080 | PISTON ASS'Y | 00101- | |
| YM729100-22900 | PISTON ASS'Y (OS) | 00101- | ||
| 2 | YM729100-22500 | PISTON RING ASS'Y | 00101- | |
| YM729555-22950 | PISTON RING ASS'Y,0.25MM (OS) | 00101- | ||
| 3 | YM129150-22300 | PIN,PISTON | 00101- | |
| 4 | YM121100-22400 | RING,SNAP | 00101- | |
| 5 | YM729150-23700 | CONNECTING ROD A. | 00101- | |
| 6 | YM729150-23600 | CRANK PIN METAL A. | 00101- | |
| YM129150-23610 | CRANK PIN METAL A.,0.25MM (US) | 00101- | ||
| 7 | YM121550-23200 | BOLT | 00101- | |
| 8 | YM129100-23910 | BUSHING,(SERVISE PARTS) | 00101- |