no bbk is the best bang for the buck, you get speed and power from what i know.my scooter with 70 bbk has and can beat most 150s and the 96cc dogs them wont even compare a stock scooter against it. I f your light enough a stock scooter 2t will do 45 ish but a good bbk when setup right will be 50-55 range and have double the power through out the rpm range
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