Stay away from BGF. I got 2 MB, one built with a grubee gt5 66cc. The other with a BGF 66cc. Grubee walks on it all day and not a problem yet. The BGF kit has had issues from the start, late shipping, mounting studs break easily, clutch noise is louder, the overall quality compared to the grubee doesn't come close. Unless I got a lemon, in my opinion, spend the extra money and get a grubee (non-cns).
Mile High Motor Bicycle
EZ Motorbike Dealer - Denver, CO