Yamaha YFM350 Warrior Piston Kit - Wiseco - Forged Series 12:1 CR - `87-`13. A direct-fit Wiseco forged piston kit for Yamaha YFM350 Warrior/Raptor models, supplied as a complete kit for rebuilds or performance-focused refreshes.

This Forged Series piston is built for 4-stroke applications where durability and consistent compression matter. The piston is forged to optimize strength and service life, and the kit is supplied with the wrist pin, piston rings, and circlips required for installation. With an 84.00 mm bore and a 12:1 compression ratio, this Wiseco piston is suitable for owners restoring or modifying `87-`13 YFM350 Warriors who need a reliable replacement that aligns with the original design parameters.

Features

• Forged construction for improved strength and fatigue resistance
• Complete kit includes piston, wrist pin, rings, and circlips
• 84.00 mm bore size with 12:1 compression ratio
• Designed for 4-stroke ATV applications including YFM350 Warrior/Raptor

This piston kit offers a straightforward path to restore compression and service life without replacing other engine components. If you have questions about fitment, clearances, or pairing with other engine upgrades, call us directly — we can advise on selections and installation options. We have two service locations where we offer installation and customization: Austin, Texas and the Los Angeles, California area. Call 512-982-9393 (TX) or 562-981-6800 (CA) for assistance or to schedule service.

If you are considering purchasing multiple items, contact us for possible shipping discounts. We install on premises at both locations.

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