| 1-1 | Superseded by part #12110-02B43-0F0 below: | 12110-02B42-0F0 | --- | 1 | --- |
| 1-1 | Piston | 12110-02B43-0F0 | $85.84 | 1 | |
| 1-2 | Superseded by part #12103-02821-050 below: | 12110-02B42-050 | --- | 1 | --- |
| 1-2 | Piston (Os:0.5)This part is no longer available. | 12103-02821-050 | --- | 1 | --- |
| 1-3 | Superseded by part #12103-02820-100 below: | 12110-02B42-100 | --- | 1 | --- |
| 1-3 | Piston (Os:1.0)This part is no longer available. | 12103-02820-100 | --- | 1 | --- |
| 2-1 | Superseded by part #12141-02B70 below: | 12141-02B50 | --- | 1 | --- |
| 2-1 | Ring, Piston | 12141-02B70 | $16.93 | 1 | |
| 2-3 | Ring, Piston (Os:1.0) Note: ; OPTThis part is no longer available. | 12141-02B50-100 | --- | 1 | --- |
| 2-2 | Ring, Piston (Os:0.5) Note: ; OPTThis part is no longer available. | 12141-02B50-050 | --- | 1 | --- |
| 3 | Pin, Piston | 12151-20910 | $9.30 | 1 | |
| 4 | Snap Ring | 09381-14001 | $1.89 | 2 | |
| 5 | Bearing, Piston Pin | 09263-14016 | $9.09 | 1 | |
| 6 | Crankshaft AssyThis part is no longer available. | 12200-02B40 | --- | 1 | --- |
| 7 | Superseded by part #12161-02B10 below: | 12161-02B41-0D0 | --- | 1 | --- |
| 7 | Rod, Connecting | 12161-02B10 | $61.34 | 1 | |
| 8 | Washer | 09160-18023 | $4.34 | 2 | |
| 9 | Pin, Crank | 12211-02B42 | $24.23 | 1 | |
| 10 | Bearing | 09263-18026-0C0 | $34.79 | 1 | |
| 11 | Crankshaft, RhThis part is no longer available. | 12221-02B40 | --- | 1 | --- |
| 12 | Crankshaft, LhThis part is no longer available. | 12261-02B40 | --- | 1 | --- |
| 13 | Bearing (20 X52 X15) Note: BEARING (20X52X15); | 09262-20082 | $17.41 | 2 | |
| 14 | Superseded by part #09283-30061 below: | 09283-30058 | --- | 1 | --- |
| 14 | Seal, Crankshaft Oil Rh (30 X40 X7) | 09283-30061 | $13.93 | 1 | |
| 15 | Oil Seal, Lh (18 X30 X6) | 09283-18006 | $5.60 | 1 | |
| 16 | Superseded by part #12359-27C30 below: | 12359-01B01 | --- | 1 | --- |
| 16 | Spacer, Primary Drive Gear | 12359-27C30 | $11.24 | 1 | |
| 17 | O Ring | 09280-20004 | $1.89 | 1 | |
| 18 | Superseded by part #21111-02B41 below: | 21111-02B40 | --- | 1 | --- |
| 18 | Gear, Primary Drive (Nt:18) | 21111-02B41 | $35.57 | 1 | |
| 19 | Nut | 09140-16019 | $3.46 | 1 | |
| 20 | Washer | 09164-16002 | $3.22 | 1 | |
| 21-1 | Superseded by part #12102-02823 below: | 12102-02820 | --- | 1 | --- |
| 21-1 | Top End Kit, Engine (Std)This part is no longer available. | 12102-02823 | --- | 1 | --- |
| 21-2 | Superseded by part #12102-02823-050 below: | 12102-02820-050 | --- | 1 | --- |
| 21-2 | Top End Kit, Engine (Os:0.5)This part is no longer available. | 12102-02823-050 | --- | 1 | --- |