This piston kit will fit all Yamaha 40/50 hp 3 Cyl. 1995 & Up Power Heads. Piston is a full cast and comes with Rik Japanese high performance rings. Wiseco pistons are forged and use Wiseco high performance rings.
Order Std size pistons if you are only honing your cylinders. If you have more damage to the bore and the cylinder will not clean up at STD. Please order the correct over size piston kit. Be sure to inspect your sleeves carefully for chipping and cracks. If you have damages beyond boring click Cylinder Resleeving Services for more information and pricing.
Please Note: The picture for this item is a generic photo. If you want to see the parts pictures for each item in kit, please click the links below.
We also offer top end rebuild kits with cylinder already machined ready to install on a core exchange basis. Click here for more information and pricing.
Complete power head rebuild kit includes:
| Description | Part Number | Qty. |
| Piston Kit |
100-252k | 3 |
| Gasket Kit | 500-316 | 1 |
| Upper Main Bearings | 010-210 | 1 |
| Center Main Bearings | 010-210 | 2 |
| Lower Main Bearings |
010-210 | 1 |
| Upper Rod Bearings | 010-180-30 | 3 |
| Lower Rod Bearings | N/A (press crank) |
