Could you go to a better quality vacuum pump, like a Honda product? I replaced enough vacuum pumps on a friend's China scooter to know I don't trust them. Fuel would often leak through the China pump and fill the crankcase with gasoline.
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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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