Athena Manufacturing

P400485100032

Athena (P400485100032) 83mm 290cc Big Bore Cylinder Kit

SKU: PU-0931-0252

Pistons

Fits: Yamaha WR250 X/R 2008-2013
Athena's Big Bore kit brings the raw power you have been missing in an easy to install, reliable package that bolts on with no machining needed in most cases, and includes easy-to-follow step-by-step installation instructions
Constructed from aluminum, the cylinder is lined with a nickel-carbide coating for durable, reliable performance, and the water jackets have been widened for a higher flow rate, cooling the cylinder, resulting in less power lost due to heat
Features a forged piston that's been molybdenum coated for high performance use and extended wear life
Includes: Big bore cylinder, big bore piston, piston pin, piston pin rings, gasket kit, Note: to achieve optimum performance re-jet the carburetor with the available jet kits

Athena's Big Bore kit brings the raw power you have been missing in an easy to install, reliable package that bolts on with no machining needed in most cases, and includes easy-to-follow step-by-step installation instructions. Constructed from aluminum, the cylinder is lined with a nickel-carbide coating for durable, reliable performance, and the water jackets have been widened for a higher flow rate, cooling the cylinder, resulting in less power lost due to heat. Features a forged piston that's been molybdenum coated for high performance use and extended wear life. Includes: big bore cylinder, big bore piston, piston pin, piston pin rings, gasket kit. Note: To achieve optimum performance re-jet the carburetor with the available jet kits. Fits: Yamaha WR250 X/R 2008-2013.

Can be used with bearing race tools 35100, 60747 & 57905 which are available separately-by-jims
Genuine Chrysler 3461664 Automatic Adjuster
Mix me 3925