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About Koso North America 170cc Big Bore Kit

Koso North America 170cc Big Bore Kit

  • Includes ceramic coated cylinder, 61mm forged piston, rings, pin, gasket kit and banjo bolts
  • Compression ratio of 11. 5 to 1
  • Optional camshaft kit can be used with stock engine, but delivers improved results when used with 170cc Big Bore kit.

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