Thats a good sighn, your engine will accept the many upgrades available for the GY6 engine. One of the other engines they use the stud spread is 3 1/8" whigh will not accept the big bore kits and also the head is taller using differant valves and rockers to where the performance cam will not fit it, however on some of those engines the cams did fit but the performance was not like that of the normal gy6 due to the differant angle of the valves and the difference in rocker arm ratio. TOM
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