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I can buy or make an adaptor to enlarge the drive shaft. https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1311&_nkw=5%2F8+to+3%2F4+shaft+adapter&_sacat=0 I want to use the smaller engine in order to save weight and space -- the 20 buck difference in price isn't a...

I am building a gas scooter. I plan to use a 79cc predator engine. The wheels will be 14" tall. I weigh 180 lbs. The scooter will weigh another 50-60 lbs. I don't need or want this to go very fast. The largest concern is that it climb semi-steep hills. The lowest I can easily gear this...

The Kit is here: https://www.gopowersports.com/mega-moto-212cc-mini-bike-kit/ It has a torque converter, going to a jackshaft arrangement. The bike does go faster when I get to a downhill. It hit 26 before I ran out of room. I looked at the tach when I was driving and i was in the 3600...

I built this from a GPS kit. I figured out that the throttle cable was binding and prevented the full travel of the throttle linkage. I rerouted the cable to fix the binding problem. I also eased the throttle stop screw out on the engine. The bike now goes 22 MPH. I now feel comfortable...

How fast should a mega motor 212 be with a stock predator hemi 212? I weigh 180 pounds and this bike only gets up to 13 mph.