Cylinder Works Honda CRF 250R 2010-2017 Big Bore Cylinder Kit 270cc 11007-K01

Stock displacement limits your Honda CRF 250R's potential—this big bore kit unlocks an additional 20cc of swept volume, delivering measurable gains in mid-range torque and top-end power without sacrificing reliability. The bolt-on design means you're back on the track or trail within hours, not days, while the matched Vertex pistons and Nickel Silicon Carbide plating ensure your investment holds up to sustained high-load riding.

Whether you're chasing lap times or simply want more responsiveness from your 250R, this U.S.A.-made kit eliminates guesswork with a complete, ready-to-install package that requires zero machine work or re-plating.

• 270cc displacement upgrade
• Fits CRF 250R 2010–2017
• Direct bolt-on installation
• Matched Vertex pistons included
• Nickel Silicon Carbide bore plating
• Complete gasket set included
• Piston rings and clips included
• Wrist pin included
• Zero machine work required
• Made in U.S.A.
• MPN: 11007-K01