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    WOT/Loud and slow

    Hello, I am working on improving my motor bike currently. It is very reliable and will always start. Last summer I could easily go 35 mph at WOT but now I have trouble doing anything above 12 mph. I am not sure what is going on but these are my symptoms and what I have done to try and fix it...
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    New style of 66cc engine:To port or not to port

    Hello everyone, This is my first post. Some background on myself in regards to motorized bicycles is that I have already built on 66cc motorized bike. It was pretty junkie bike but I really enjoyed working on it. Also I got it going about 27mph with all stock on 24" wheels. It became so...