Yamaha WR 250 F Top End Piston Kit - Vertex Pistons - A, B or C pistons - 2020–2023. A direct-fit Vertex top-end kit engineered for WR250F riders who need reliable replacement pistons that match their bore selection and come complete for installation.

This kit includes an exact-fit Vertex piston available in A, B or C sizing to match your cylinder bore, reducing blow-by and oil consumption when matched correctly. Each kit ships with piston, rings, wrist pin and circlips so you have the parts required to rebuild the top end. Skirts receive a molybdenum disulfide (MoS2) coating to aid faster break-in and improve piston life. Pistons are heat treated with a T-5 hardening and tempering cycle for consistent material properties.

Features

• Exact-fit A, B or C piston sizes to match cylinder bore
• Complete kit: piston, rings, wrist pin and circlips included
• MoS2-coated skirts for quicker break-in and reduced wear
• T-5 heat treatment for improved durability
• Designed for 2020–2023 Yamaha WR250F top end applications

If you have questions about fitment, piston selection, or installation, call us directly — we can help you choose the right piston size and explain the procedure. Visit either of our service locations in Austin, Texas or the Los Angeles, California area for professional installation and customization services. Call Austin: 512-982-9393 (TX) or Los Angeles area: 562-981-6800 (CA).

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

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