i've been running my oil/gas mix at 20:1 and when i'm cruising full throttle i'm doing about 23mph. but when i shut off my gas line, for a few seconds i get increased power by about 4mph! how can i achieve this power ALL the time? is it the gas mixture? any advice will me most helpful.![:-|| :-|| :-||](https://motorbicycling.com/images/smilies/Waa.gif)
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