Honda TRX500 Foreman 4V Piston Kit - Wiseco - 8.31 CR, 92.50 mm Bore - `01-`14. This Wiseco piston kit is built for riders who want a durable, application-specific replacement piston for TRX500 Foreman 4V models from 2001–2014.

Wiseco's forged 4-stroke pistons are engineered to the tight tolerances required for modern powersports engines. This kit is the correct 92.50 mm bore size with an 8.31:1 compression ratio, made from dedicated forgings that improve tensile strength and provide a balanced strength-to-weight ratio. The piston is machined for the TRX500 Foreman 4V application and supplied with high-quality piston rings, wrist pin, and circlips, ready for installation or further engine work. Manufactured and machined in Mentor, Ohio, this kit is suited for enthusiasts performing a rebuild or upgrade who value precise fit and reliable materials.

Features

• Forged 4-stroke Wiseco piston engineered for Honda TRX500 Foreman 4V (2001–2014)
• 92.50 mm bore, 8.31 compression ratio
• Includes piston rings, wrist pin, and circlips
• Dedicated forging for optimized strength-to-weight
• Machined and manufactured in the USA (Mentor, OH)

If you have questions or need help choosing the right parts for your build, call us directly — we’re happy to assist. We offer installation and customization services at two locations: Austin, Texas and the Los Angeles, California area. Call us at 512-982-9393 (TX) or 562-981-6800 (CA) to discuss fitment, scheduling, or any technical questions.

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

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