Yamaha WR 450 F Forged Replica Piston Kit - Vertex Pistons - 03-15. A direct-fit forged replica piston kit designed for riders looking to restore or upgrade the WR450F top end with quality Vertex components.

This Vertex piston kit is engineered to match the original Yamaha specifications while offering the durability benefits of a forged replica design. Exact-fit A, B or C pistons are available to match your cylinder bore for improved sealing, which helps reduce blow-by and oil consumption. Each kit is complete with piston, rings, wrist pin and circlips so you have what you need for a proper rebuild. Skirts are coated with molybdenum disulfide (MoS2) to promote faster break-in and reduce initial wear. Pistons are heat treated using a T-5 hardening and tempering cycle to provide consistent strength and longevity.

Features

• Exact fit A, B or C pistons to match cylinder bore and minimize blow-by
• Complete kit: piston, rings, wrist pin and circlips included
• Skirts coated with MoS2 (molybdenum disulfide) for faster break-in and reduced wear
• Heat treated with T-5 hardening and tempering cycle for consistent durability
• Fits Yamaha WR450F model years 2003–2015

If you have questions or want help selecting the correct piston size for your bore, 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) for appointments or technical questions. If you’re considering 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