| Item | Part No. | Part Name | Qty | Serial No. |
| ENGINE, TIER I (SEE FIG. A0100-01A0) | A40034-A40042- | |||
| YM123900-11331 | VALVE COVER | A40034-A40042- | ||
| 1 | (NSS) | COVER | A40034-A40042- | |
| 2 | YM119593-03100 | FILTER | A40034-A40042- | |
| 3 | YM123900-03202 | PLATE | A40034-A40042- | |
| 4 | YM123900-03210 | GASKET | A40034-A40042- | |
| 5 | YM123900-03220 | HOSE, BREATHER | A40034-A40042- | |
| 6 | YM123900-11310 | GASKET, VALVE COVER | A40034-A40042- | |
| 7 | YM260220-50122 | SCREW | A40034-A40042- | |
| 8 | HEAD, CYLINDER (SEE FIG. A0103-01A0) | A40034-A40042- | ||
| 9 | YM124160-01751 | CAP | A40034-A40042- | |
| 10 | YM243110-00320 | O-RING | A40034-A40042- | |
| 11 | YM124160-11360 | KNOB | A40034-A40042- | |
| 12 | YM243110-00120 | O-RING | A40034-A40042- | |