Cylinder Works Big Bore Cylinder Kit 80mm 276cc - KTM 250 SX-F / XC-F / XCF-W / EXC-F (2005-2013)
Cylinder Works Big Bore Cylinder Kit 80mm - KTM 250 SX-F / XC-F / XCF-W / EXC-F
Take your KTM 250 from 250cc to 276cc with this complete big bore cylinder kit. The +4mm overbore delivers noticeable power gains throughout the RPM range. Includes Vertex matched piston, Nikasil plated cylinder, and full gasket kit. Direct bolt-on with no machine work required. Made in the USA.
What's Included
- Cylinder Works 80mm big bore cylinder
- Vertex matched piston
- Piston rings
- Wrist pin and clips
- Complete top end gasket kit
Key Features
Big bore design increases displacement from 250cc to 276cc. Nikasil plated cylinder for long life and excellent heat transfer. Vertex piston ensures longevity and reduced engine noise. Looks virtually identical to OEM. Direct bolt-on installation with no machine work required.
Specifications
- Bore Size: 80mm (+4mm overbore)
- Displacement: 276cc
- Compression Ratio: 13.3:1
- Engine Type: 4-Stroke
- Material: Cast Aluminum with Nikasil plating
- Weight: 3.26 lbs
Fitment
KTM 250 SX-F: 2005-2012
KTM 250 XC-F: 2006-2012
KTM 250 XCF-W: 2006-2013
KTM 250 EXC-F: 2007
KTM 250 XCF-W Six Days: 2011
Why Cylinder Works?
Cylinder Works is a trusted name in powersports engine components. Their cylinders and kits are manufactured in the USA to strict tolerances. Used by professional racers and weekend riders who demand reliability.
OEM Reference Numbers
77030005100, 77030038800, 77230138000
📦 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.
