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!
📦 Shipping Information
In-Stock Items:
- Most parts ship next business day
- Modquad parts: Monday–Thursday dispatch
Made-to-Order Items:
- Custom swingarms & A-arms: 2–4 weeks
- EVP exhaust systems: 2–4 weeks
- Sneakers: 1–2 weeks
Stock Guarantee: Items marked "In Stock" ship immediately. Made-to-order items are built fresh for you.
Questions? Contact us—we respond within 24 hours.
