Im in the works of putting together a beast... its gonna be kind of a cross between a down hill mtb and a hill climb dirt bike... probly going to use a 60 tooth rear sprocket in attempt to maximize torque... just going to suck to have to sacrifice the speed...Soft tail needs to have a jack shaft were the pedal sprocket is to work right so the chain stays from a floppen. May still need a spring tensioner besides..........Curt