another start up with the model 21 tune in the carb. making sure everything is all good

[@sledge101479]

I'm new to building. How do you control vibration at high RPMs? Do you use balanced crankshifts? How much does endplay factor in?

[@elijahgoodman5359]

can somewhat balance cranks, th-cam.com/video/na9YZ5UzAKg/w-d-xo.html&ab_channel=MiniDragBike This guy is good