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Old 12-20-2011, 04:37 PM
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Cavi Mike Cavi Mike is offline
Motorized Bicycle Elite Member
Join Date: Dec 2011
Location: Rochester, NY
Posts: 189
Default Re: +7 mph by fixxing poor quality on 66cc

The leaking carb/manifold is a common and well-known issue and it's easily remedied by a simple o-ring placed inside the manifold. I'm sure all of the port-matching and everything you did netted you some gains but fixing that leak is the biggest problem with these engines. I'm honestly really surprised they haven't started including an o-ring with the kit considering how much other extra stuff they give you.
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