Yamaha Vector Piston Kit - Wiseco - Domed 12.51 CR - `05-`06. This Wiseco Forged Series piston kit is produced for 2005-2006 Yamaha Vector 4-valve engines, supplying a direct-replacement forged piston with a 79.00 mm bore and a 12.5:1 compression ratio for enthusiasts and builders.

Built as a complete package, the kit includes the forged piston, wrist pin, rings, and circlips so you have the components needed for installation. Forged construction provides improved strength and longer service life under high-stress conditions commonly encountered in ATVs, UTVs and performance snowmobile use. The domed piston profile achieves the specified 12.51:1 compression ratio when used in compatible engine builds, making it suitable for users seeking a reliable, application-specific replacement without unverified performance claims.

Features

• Wiseco Forged piston material for enhanced durability
• Complete kit: piston, wrist pin, rings, and circlips included
• 79.00 mm bore with domed piston to yield 12.5:1 compression ratio
• Fitment target: Yamaha Vector 2005–2006 4-valve engines

If you have questions about fitment or installation, call us directly at 512-982-9393 (TX) or 562-981-6800 (CA). We offer installation and customization services on premises at both of our locations in Austin, Texas and the Los Angeles, California area. If you are considering purchasing multiple items, contact us for potential shipping discounts. We install on premises at both locations.

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