Seller notes

Description Please carefully check your cylinder valve status BEFORE you place order. 70001 is for long valve 69mm version. 80 cc Big Bore Kit This kit fits with most Chinese Scooters/Mopeds with 50cc, 60cc, 4-Stroke GY6/139QMB engines!!! This bore kit can rebuild your 50cc 60cc bike to 100cc. This will increase your powerband anywhere from 50-75% so be ready to go faster!!! Included in this big bore set is: • Cylinder Engine Head, (69mm valves) • Cylinder (47mm Inner Diameter) • Piston (4...

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