Yamaha YFM250RX Piston Kit - Wiseco - `08-`13. This Wiseco forged piston kit is built for the YFM250RX (2008–2013) to replace worn components or support engine refreshes and performance-minded builds.

Wiseco 4-stroke pistons are engineered for specific powersports engines and produced to tight tolerances. This kit is a dedicated forging for the Yamaha YFM250RX that balances strength and weight while offering improved tensile strength over cast components. The piston is forged, machined in the USA (Mentor, OH), and supplied as a complete kit to simplify installation. Included are high-quality piston rings, wrist pin(s), and circlips so you receive the critical hardware needed for a proper rebuild at standard 74.00 mm bore with a 10.5:1 compression ratio.

Features

• Application: Yamaha YFM250RX 2008–2013 (standard 74.00 mm bore, 10.5:1 CR)
• Forged 4-stroke piston engineered for specific engine fits
• Includes piston rings, wrist pin(s), and circlips
• Manufactured and machined in the USA (Mentor, OH)
• Improved tensile strength and controlled tolerances for consistent fit

If you have questions or need help confirming fitment, call us directly — we’re happy to assist. We offer installation and customization services at our two locations: Austin, Texas and Los Angeles, California area. Call us: 512-982-9393 (TX) or 562-981-6800 (CA). If you are considering purchasing multiple items, contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov