Athena Hyper Race Cylinder Kit
Purpose-built for competition: The Athena Hyper Race Cylinder Kit is the race version of the popular 70cc big bore kit, engineered for maximum power, reliability, and quick installability. Sold as a single part number for convenience, every component is also available separately for custom tuning and rebuilds.
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Complete kit includes: cylinder, head, piston assembly, reeds, and gaskets — everything needed for a high-performance upgrade.
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Piston kit option: piston, rings, wrist pin, and circlips supplied for easy replacement or rebuilds.
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Carburetor feature: carburetors include a manual choke assembly for reliable cold starts and tuning control.
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Hyper Race crankshafts: upgraded with a lighter connecting rod, full crank rounds, and special needle bearings for reduced rotating mass and improved throttle response.
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Compatibility note: Hyper Race crankshafts use a larger 12mm wrist pin and will not work with OEM-type stock or standard Athena big bore pistons.
Ideal for racers and tuners seeking a ready-to-run race kit or the flexibility to build a custom high-performance package. Check individual part availability to tailor the setup to your machine and riding style.
