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The Complete and Definitive Tutorial Guide for the 50cc Gy6 139QMB Big Bore Kit Install
I try to cover every part of a BBK cylinder swap and information on cam swap. I believe in DIY and you will always do a better job than a shop if you do it yourself. I am installing a Naraku 100.52 kit on a IceBear Maddog 49cc Scooter.
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