| Item | Part No. | Part Name | Qty | Serial No. |
| 1 | 20Y-01-11112 | DAMPER | 50001-56285 | |
| 2 | 203-01-51120 | PIN | 50001-56285 | |
| 3 | 01010-81020 | BOLT | 52741-56285 | |
| 3 | 01010-51020 | BOLT | 50001-52740 | |
| 4 | 01643-31032 | WASHER | 50001-56285 | |
| SEE FIG.A9990-01A2 OF ENGINE GROUP FOR SERIAL NO.56286 AND UP. |