Re: Bottom crank jack shaft.
Ooooohhh i thought that you guys were going to do it with no pedals, so I thought he was push starting or something. I can't see the pics very well on my phone.... I know exactly how an sbp kit works. And torque means nothing without rpm, 2200 rpm means a lot of horses with the torque from a big rig. You could put an engine with less torque but more rpm and the same HP and as long as it has optimal gearing it will perform similarly. If you have an engine with 1000 ft/lbs of torque but only 1 rpm, you can pull a lot but not fast at all. The same result could be achieved with an engine that has 1 ft/lb torque and 1000 rpm as long as it has proper gearing for the application.
some people say that a motorbike defeats the purpose of a bike. i tell them to get a flintstone's car.