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Athena Big Bore Cylinder Kits
New Price:$689.99

BUY NOW

Machine:
Comes with a brand new cylinder, with larger water jackets for better cooling, nickel-carbide plated cylinder, forged piston, rings, clips and gasket kit.

These Big Bore kits take the 450cc dirt bikes/ATV to 100mm cylinders and between 490 - 498cc (YZF450 becomes a 478cc).

The 250cc dirt bikes cylinders are 82 - 83 mm and 290cc.

The 450cc ATV cylinders are 97 - 98 mm and 475 - 480cc.  The LTZ400 becomes 435cc with a 94 mm cylinder.
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