Yamaha YFM350 Warrior Piston Kit - Wiseco - Forged Series 11:1 CR - `87-`13. This complete piston kit is made by Wiseco for the Yamaha YFM350 Warrior/Raptor and is specified with an 84.00 mm bore and an 11:1 compression ratio. It’s engineered for 4-stroke ATV applications covering model years 1987–2013.

The Forged Series pistons are manufactured from forged material to provide improved strength and service life under higher-stress conditions common in off-road use. This kit includes the piston, wrist pin, rings and circlips so you have the core components needed for a piston replacement or engine refresh. Designed for ATV and UTV use, the piston maintains precise tolerances for consistent fitment and reliable combustion characteristics without adding unverified performance promises.

Features

• Wiseco Forged piston construction for durability
• Complete kit: piston, wrist pin, rings, circlips included
• 84.00 mm bore, 11:1 compression ratio
• Fits Yamaha YFM350 Warrior / Raptor models (1987–2013)
• Engineered for 4-stroke ATV/UTV applications

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

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