Seller notes

Brand new 80CC BBK BIG BORE KIT for Chinese 4 stroke Scooters & Mopeds Upgrade GY6 49cc 50cc to 80cc The best way to get more RPM. We don't add in useless part to make the BBK looks fat, all parts in our BBK are the best out there to increase your top end performance. Big Bore kit includes Fully assembled cylinder head 69mm high lift valves, best performance valves 69mm high lift rockers, best performance rockers Cylinder bodyCylinder head gasket set 3 up-sized main jets and matching pilot jets ...

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