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hey guys, im building a motor for my brother,hf 6.5, so far he has gotten the new flywheel, billet rod. 18lb springs, pushrods, gx160 head, intake adapter with airfilter, 275 cam, rejetted, and custom exhaust ,what you guys think the max safe rpm for this motor will be and also how hp will i...

hey guys, just wanted to introduce my self, i have a mini "harley" that my mom bought me a long long time ago. the one with the 49cc pos motors in it. well i decided to put a 6.5hp HF motor in it, i know these bikes a are a pos but you got to work with what ya got :) and heres the out come...