Honda CRF250R 2004–2009 & CRF250X 2004–2017 81mm Big Bore 269cc 13.0:1 Cylinder Kit – Cylinder Works

Honda CRF250R (2004–2009) & CRF250X (2004–2017)

Cylinder Works 81 mm Big Bore Cylinder Kit – 269 cc, 13.0:1 Compression Part #: 11001-K01

Turn your 250 into a 269 cc torque monster – instantly! This complete bolt-on kit adds +14 cc and 13.0:1 compression with zero machine work required. Ready-to-install, race-proven, and looks 100 % factory.

What’s in the Box

• 81.00 mm Big Bore Cylinder (nickel-silicon carbide plated)
• Vertex 13.0:1 High-Compression Piston Kit (piston, rings, pin, clips)
• Full Top-End Gasket Kit (head, base, exhaust gaskets)

Key Benefits

• +14 cc displacement (255 → 269 cc)
• 13.0:1 compression for explosive mid-to-top power
• NiCaSil plating = super wear resistance & excellent heat transfer
• No machining or boring needed – true drop-in install
• OEM appearance – clean and factory fresh
• Made in the USA with pro-level quality

Confirmed Fitment

• Honda CRF250R → 2004–2009
• Honda CRF250X → 2004–2017

Backed by Cylinder Works limited warranty. Replacement pistons, rings, and gaskets always in stock.

Plug it in, pin it, and feel the difference on the first ride!