Before changing the weights and adding a big bore kit, you might choose to optimize the intake and exhaust. My Pastor had a 50cc Saga scooter, and the intake was very restrictive (the exhaust was a joke).
Check out the thread that details it: http://www.chinariders.net/modules.p...=12294&start=0
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Weldangrind
"I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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