| Item | Part No. | Part Name | Qty | Serial No. |
| ENGINE, TIER I (SEE FIG. A0100-01A0) | A70010-A70013- | |||
| YM72390011100 | CYLINDER HEAD | A70010-A70013- | ||
| YM12390011000 | CYLINDER HEAD | A70010-A70013- | ||
| 1 | (NSS) | HEAD | A70010-A70013- | |
| 2 | YM12390011080 | SEAT, VALVE | A70010-A70013- | |
| 3 | YM12390011090 | SEAT, VALVE | A70010-A70013- | |
| 4 | YM11900011810 | GUIDE, VALVE | A70010-A70013- | |
| 5 | YM23871005000 | PLUG | A70010-A70013- | |
| 6 | YM27241400000 | PLUG | A70010-A70013- | |
| 7 | YM27310090000 | KEEPER | A70010-A70013- | |
| 8 | YM12390011100 | VALVE | A70010-A70013- | |
| 9 | YM12390011110 | VALVE | A70010-A70013- | |
| 10 | YM12390011120 | SPRING | A70010-A70013- | |
| 11 | YM12185011150 | SEAL, VALVE | A70010-A70013- | |
| 12 | YM12185011180 | RETAINER | A70010-A70013- | |
| 13 | YM11917111370 | CAP | A70010-A70013- | |
| 14 | YM11962511870 | PROTECTOR | A70010-A70013- | |
| 15 | YM11962511880 | GASKET | A70010-A70013- | |
| 16 | YM11962511900 | RETAINER | A70010-A70013- | |
| 17 | YM26216060302 | STUD | A70010-A70013- | |
| 18 | YM26366060002 | NUT | A70010-A70013- | |
| 19 | YM12390007900 | LIFTER | A70010-A70013- | |
| 20 | YM26106100202 | BOLT | A70010-A70013- | |
| 21 | YM11917401200 | BOLT | A70010-A70013- | |