| Item | Part No. | Part Name | Qty | Serial No. |
| \0 | (871070033) | ENGINE, ASSY. | ||
| 1 | YM129001-21000 | CRANKSHAFT, ASSY. | ||
| 2 | YM129100-01580 | PEG | ||
| 4 | YM129150-21200 | GEAR | ||
| 5 | YM22512-070140 | KEY | ||
| 7 | YM22351-040010 | PIN | ||
| 8 | YM171340-21650 | PULLEY | ||
| 9 | YM129795-21661 | WASHER | ||
| 10 | YM121850-21680 | BOLT | ||
| 11 | YM121111-21501 | SCREW | ||
| 12 | YM129128-21590 | FLYWHEEL | ||
| 14 | YM119865-21600 | GEAR, RING | ||
| 15 | YM129002-22070 | PISTON, ASSY. | ||
| 15 | YM129002-22930 | ASSY, PISTON (+0.25 mm) | ||
| 17 | YM129002-22500 | RING SET, PISTON | ||
| 17 | YM129002-22950 | RING SET (+0.25 mm) | ||
| 21 | YM129202-22300 | PIN | ||
| 22 | YM22252-000260 | CIRCLIP | ||
| 23 | YM729402-23100 | CONNECTING ROD, ASSY. | ||
| 26 | YM129100-23910 | BUSHING | ||
| 27 | YM121550-23200 | SCREW | ||
| 28 | YM129150-23600 | BEARING | ||
| 28 | YM129150-23610 | BEARING (--0.25 mm) |