I have an fl 350 that I have been working on lately, I was told it should do about 60 mph, but it is only doing 30 - 35 right now. The engine runs good at first it revs up like normal but sort of boggs down after i give it half throttle. The belt is really loose. I don't know much about odysseys most of what i know is in snowmobiles. Just wondering if anyone had an idea of why it is so slow.