Kawasaki KX 85 Piston Kit - Vertex Pistons - Top End - '14-'23. A direct-fit Vertex top-end kit designed for the 85cc KX 85 (model years 2014–2023), supplied as a complete piston assembly to replace worn or damaged top-end components.

This Vertex piston kit delivers repeatable, factory-style fit and finish for riders restoring performance or preparing a rebuild. Kits are available in A, B or C sizes to match your cylinder bore and help minimize blow-by and oil consumption. Each kit includes the piston, rings, wrist pin and circlips so you have the parts needed for a proper top-end job. Skirts are coated with molybdenum disulphide (MoS2) to improve break-in characteristics and reduce initial friction, while a T-5 heat-treated hardening and tempering cycle increases piston durability for normal riding conditions.

Features

• Exact-fit A, B or C piston options to match cylinder bore
• Complete kit: piston, rings, wrist pin and circlips included
• MoS2 skirt coating for faster break-in and reduced friction
• Cast replica piston, heat treated with T-5 hardening/tempering
• Compatible with Kawasaki KX85 2014–2023

These kits are well suited for enthusiasts performing scheduled top-end maintenance, repairs after seizure or wear, or preparing a bike for track use where correct clearances and reliable parts matter. The included rings and hardware simplify installation and reduce the chance of missing components during a rebuild.

If you have questions or need help selecting the correct size, call us directly — we’re happy to advise. 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).

If you're 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