| Item | Part No. | Part Name | Qty | Serial No. |
| ENGINE, TIER II (SEE FIG. A0100-01A1) | A90009-- | |||
| YM72390711100 | CYLINDER HEAD | A90009-- | ||
| 1 | (NSS) | HEAD, CYLINDER | A90009-- | |
| 2 | YM12032511160 | GUIDE, EXHAUST VALVE | A90009-- | |
| 3 | YM12390711160 | GUIDE, INTAKE VALVE | A90009-- | |
| 4 | YM23876020000 | PLUG | A90009-- | |
| 5 | YM23876030000 | PLUG | A90009-- | |
| 6 | YM27241400000 | PLUG | A90009-- | |
| 7 | YM12390711100 | VALVE, INTAKE | A90009-- | |
| 8 | YM12390711110 | VALVE, EXHAUST | A90009-- | |
| 9 | YM12390711120 | SPRING, VALVE | A90009-- | |
| 10 | YM12390711180 | RETAINER, SPRING | A90009-- | |
| 11 | YM12416011340 | SEAL, INTAKE VALVE | A90009-- | |
| 12 | YM12495011340 | SEAL, EXHAUST VALVE | A90009-- | |
| YM12390711510 | VALVE BRIDGE | A90009-- | ||
| 13 | YM12915011750 | NUT | A90009-- | |
| 14 | YM12390711830 | SCREW | A90009-- | |
| 15 | (NSS) | BRIDGE, VALVE | A90009-- | |
| 16 | YM27310070001 | KEEPER, VALVE | A90009-- | |
| 17 | YM12390711820 | SCREW, BRIDGE | A90009-- | |
| 18 | YM23876005000 | PLUG | A90009-- | |
| 19 | YM24311000120 | O-RING | A90009-- | |
| 20 | YM11980211870 | PROTECTOR, NOZZLE | A90009-- | |
| 21 | YM11962511880 | SEAT, NOZZLE | A90009-- | |
| 22 | YM12390707900 | LIFT, ENGINE | A90009-- | |
| 23 | YM26106100202 | BOLT | A90009-- | |
| 24 | YM12390711550 | SEAT, BRIDGE | A90009-- | |
| 25 | YM11917401200 | BOLT | A90009-- | |