Your subject says "these" motors.Kits anywhere?
The kit they show for a KTM says it comes with a 36t sprocket and that would be way too high geared for a KTM with a 26" wheel and a KTM needs to be geared much lower that a 36T. They arent at all like what you would gear a china girl. You would need at least as big as a 46T and more like a 48t.They sell kits at custommotorizedbikes.com
So like, search bar dude, it rocks.So if the motor is like on a dirt bike and has gears,. The 36t would bog down in the higher gears?