Yamaha WR250F Piston Kit — Vertex Pistons (Forged Replica) '15-'17. This piston kit is a direct-fit replacement for 250cc WR250F models from 2015 to 2017, supplied as a complete rebuild kit for the top end.

Built to match A, B or C cylinder bore specifications, this Vertex forged-replica piston kit includes the piston, rings, wrist pin and circlips required for installation. Skirts are treated with a molybdenum disulphide (MoS2) coating to promote faster, controlled break-in and help reduce initial friction. The piston is heat treated using a T-5 hardening and tempering cycle for consistent strength and durability. Proper fit reduces blow-by and oil consumption when the correct bore size is chosen, and the kit is intended for riders and mechanics who want a reliable, OEM-replacement style component for custom engine work or routine top-end service.

Features

• Direct-fit for Yamaha WR250F ('15-'17) in A, B or C bore sizes
• Includes piston, rings, wrist pin and circlips
• Forged-replica construction with T-5 heat treatment
• MoS2-coated skirts for improved break-in and reduced wear
• Designed to minimize blow-by and oil consumption when matched to bore

If you have questions or need help confirming fitment, call us directly — we’re happy to assist. Installation and customization services are available at our two locations in Austin, Texas and the Los Angeles, California area. Call 512-982-9393 (TX) or 562-981-6800 (CA) to schedule service or ask technical questions. If you’re considering purchasing multiple items, contact us for shipping discounts. We install on premises at both locations.

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