Yamaha YZ 85 Piston Kit - Vertex Pistons - Cast Race Evolution - '02-'24 is a direct-fit replacement piston kit designed for 2002–2024 YZ85 engines. This kit supplies a precision-matched piston assembly for riders looking to maintain or restore engine performance.

Built by Vertex, the Cast Race Evolution piston is heat-treated with a T-5 hardening and tempering cycle and features molybdenum disulphide (MoS2) coated skirts for quicker break-in and longer service life. Exact-fit A, B or C pistons match your cylinder bore to help reduce blow-by and oil consumption while preserving power delivery. Each kit includes the piston, rings, wrist pin and circlips required for a correct installation, so you get the core components needed to rebuild or upgrade your YZ85 top end.

Features

• Direct-fit for Yamaha YZ 85 ('02–'24) with A, B or C fits
• Cast Race Evolution piston design with T-5 heat treatment
• MoS2-coated skirts for faster break-in and improved skirt life
• Complete kit: piston, rings, wrist pin and circlips included
• Designed to reduce blow-by and oil consumption when matched to bore

If you have questions or need help selecting the correct fit, 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 512-982-9393 (TX) or 562-981-6800 (CA) for parts, service or to schedule a shop appointment. 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