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180cc big bore kit for Chinese 4-stroke 125cc mopeds.
This is a perfect upgrade for the GY6-type Chinese scooter engines and will make a significant improvement to performance and will work fine with the standard cylinder head/ camshaft etc.
The kit includes oversized cylinder, piston kit, rings, gasket set and a cylinder head.
NOTE: it will be necessary to bore the crankcases to accomodate the large cylinder.
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