High-quality cast Big Bore Cylinders from Twin Power™. Factory style black textured powdercoat finish with highlighted fins. Cast in iron liners for strength and durability and finish honed and ready...

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Cylinder Works 99-23 Yamaha YZ 250 250cc +5.6mm Big Bore Cylinder Kit 295cc

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Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.