@STEVEW It's very very very important to me that you elaborate on what you said about the exhaust port to exhaust flange opening,header beginning diameter, ratio. My exhaust port is big enough but the area constricts at the flange to only 23+-mm in diameter. I really want to dremel it out larger but haven't been able to find any literature on the subject. Please help. Thanks. Ryan.
Re: qt50 gear ratios and rpm explained
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