WSM - 50-521P - Piston Kit - Standard - Yamaha
Engine rebuilds are only as good as the parts that go back in, and when it comes to the piston — the component under more sustained thermal and mechanical stress than anything else in the top end — there is no room for compromise. The WSM 50-521P is a precision-engineered piston kit for Standard / Yamaha engines, built to hold dimensional tolerances across thousands of heat cycles. New lightweight design incorporates shorter piston skirts with an PTFE coating at critical wear points for quicker revs and less heat, giving you the kind of fit-from-day-one accuracy that prevents premature wear on the cylinder wall, wrist pin, and rings. Improved intake skirt with larger inlet ports for increased acceleration and overall performance. Bore - Oversize: Standard. Whether you are overboring for more displacement or simply replacing what age and hours have worn out, the 50-521P gives you a forged foundation you can trust.
Features
- New lightweight design incorporates shorter piston skirts with an PTFE coating at critical wear points for quicker revs and less heat
- Improved intake skirt with larger inlet ports for increased acceleration and overall performance
Specifications
- Bore - Oversize: Standard
- Product Name: Piston Kit
- Riding Style: ATV
- Units: Each
- Type: Dual Ring
Frequently Asked Questions - WSM - 50-521P - Piston Kit - Standard - Yamaha
How do I know if this part fits my vehicle?
Check the fitment information listed on this page against your exact year, make, model, and (where applicable) trim, engine size, or configuration. If your exact vehicle isn't listed, or you're not sure, use the product chat on this page or contact our support team before ordering - we're glad to help confirm fitment.
What does it mean if a product is listed as universal fit?
Universal fit means the product is designed to work across a range of vehicles, not that it's guaranteed to fit every one. Compare the listed measurements, mounting requirements, and connector or hardware specs against your specific vehicle before ordering, since some installations may need additional hardware or minor fabrication.
Where can I find installation instructions for this product?
General installation notes are provided above where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat on this page for questions about difficulty, required tools, or whether professional installation is recommended.
What if I have more questions about this product?
Use the product chat on this page for fitment, specs, installation, and compatibility questions, or contact our support team directly for help before you order.
