Honda XR80 Piston Kit - Wiseco - 9.71 CR, 48.00 mm Bore - `79-`03. A factory-fit replacement and upgrade piston kit engineered by Wiseco for XR80 applications, offering durable forged construction and precise tolerances for reliable performance.

This Wiseco kit is designed specifically for 4-stroke powersports engines and manufactured to tight tolerances in Mentor, OH. The forged piston improves tensile strength and service life compared with cast alternatives, while the dedicated forging optimizes strength-to-weight ratio. Each kit includes high-quality piston rings, wrist pin(s), and circlips so you have the core components required for a correct rebuild or performance refresh. The 9.71:1 compression ratio and 48.00 mm bore spec match OEM-replacement needs for the listed XR80 years and provide a consistent platform for tuning and customization.

Features

• Forged Wiseco 4-stroke piston engineered for XR80 fitment
• 9.71:1 compression ratio, 48.00 mm bore (+0.5 where applicable)
• Includes piston rings, wrist pin(s), and circlips
• High tensile strength forging for improved durability
• Manufactured and machined in the USA (Mentor, OH)

If you have questions or want 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) to speak with our technicians or schedule service.

If you’re 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