| Item | Part No. | Part Name | Qty | Serial No. |
| 1 | 6155-31-2540 | PISTON | 310521- | |
| 2 | 6151-31-2410 | PIN,PISTON | 310521- | |
| 3 | 04065-04818 | RING,SNAP | 310521- | |
| 6154-31-2030 | PISTON RING ASS'Y | 310521- | ||
| 4 | \6\ | RING,TOP | 310521- | |
| 5 | \6\ | RING,SECOND | 310521- | |
| 6 | \6\ | RING,OIL | 310521- | |
| 6151-31-3101 | CONNECTING ROD ASS'Y | 310521- | ||
| 7 | \6\ | ROD,CONNECTING | 310521- | |
| 8 | \6\ | CAP | 310521- | |
| 9 | 6150-31-3130 | BUSHING,(SERVICE PART) | 310521- | |
| 10 | 6150-31-3310 | BOLT | 310521- | |
| 11 | 02400-10413 | PIN,DOWEL | 310521- | |
| STANDARD | ||||
| 6151-31-3040 | METAL ASS'Y | 310521- | ||
| 12 | \6\ | METAL,UPPER | 310521- | |
| 13 | \6\ | METAL,LOWER | 310521- | |
| UNDERSIZE 0.25MM | ||||
| 6151-39-3040 | METAL ASS'Y | 310521- | ||
| 12 | \6\ | METAL,UPPER | 310521- | |
| 13 | \6\ | METAL,LOWER | 310521- | |
| UNDERSIZE 0.50MM | ||||
| 6151-38-3040 | METAL ASS'Y | 310521- | ||
| 12 | \6\ | METAL,UPPER | 310521- | |
| 13 | \6\ | METAL,LOWER | 310521- | |
| UNDERSIZE 0.75MM | ||||
| 6151-37-3040 | METAL ASS'Y | 310521- | ||
| 12 | \6\ | METAL,UPPER | 310521- | |
| 13 | \6\ | METAL,LOWER | 310521- | |
| UNDERSIZE 1.00MM | ||||
| 6151-36-3040 | METAL ASS'Y | 310521- | ||
| 12 | \6\ | METAL,UPPER | 310521- | |
| 13 | \6\ | METAL,LOWER | 310521- |