Yamaha YFM250RX Piston Kit - Wiseco - 13.51 - '08-'13. This Wiseco forged piston kit is designed for riders and tuners who need a durable, application-specific replacement for YFM250RX models (2008–2013).

Built to Wiseco’s tight tolerances and engineered for modern 4-stroke powersports engines, this kit delivers reliable strength and consistency for on- and off-road use. The piston is forged for improved tensile strength and optimized strength-to-weight ratio. Each kit includes the piston, high-quality rings, wrist pin(s), and circlips, allowing for a direct install or for use in custom builds. Specifications referenced by Wiseco: 74.00 mm bore and a 13.51 mm compression height; this kit is also listed for XT250 models 2013–2019 where applicable. Forged and machined in Mentor, OH, USA.

Features

• Wiseco forged 4-stroke piston, application-specific machining
• Includes piston rings, wrist pin(s), and circlips for full kit installation
• 74.00 mm bore, 13.51 mm compression height
• Manufactured in Mentor, OH — forged and machined in the USA

If you have questions or need help confirming fitment, call us directly — we’re happy to assist. We have two locations offering installation and customization services: Austin, Texas and the Los Angeles, California area. Call 512-982-9393 (TX) or 562-981-6800 (CA). If you’re 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