
- The Athena Big Bore kit is the missing source for increasing your motorcycle's raw power.
- The included 490CC cylinder on the Athena Big Bore kit is constructed out of aluminum with a galvanic coating to increase the durability. The water jets have been widened for a higher flow rate, keeping the cylinder cool.
- Athena built a reliable forged piston that has been molybdenum coated for high performance use and extended wear life.
- The Athena Big Bore kit includes a specially designed gasket kit to accommodate the big bore features.
- Another great feature of the Athena Big Bore kit is that it bolts on with no machining needed, and includes easy-to-follow step-by-step installation instructions.
- The Athena 490CC Big Bore Kit includes: cylinder, piston, ring(s), pin, clips, top end big bore gasket kit.
MotoSport.com Price: $684.99 - $899.99
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