yeah...i was designing my bike for a long period of time...and then i was fed up...and did the simplest thing possible....which was to attach it so...it didnt dis-engage
talk about dangerous.....but no worries to anyone...i was carefull...and i do know that many...many 14 year olds are very bad at jujement...i try to be my carefullest...(is that a word?)....but recently...i put a new back tire on the bike...(the tire had been worn down ALOT before the motor was on)....and when i did this...the roller that touched the tire sheared off inside the keyway in the crankshaft
and ive been stuck ever since....i think i might need to weld it somehow. And to anyone out there who hasnt discovered the wonderes of threadlock....its a dream....on my bike with the engine...the system would fall apart from vibration every 10-15 seconds...but with threadlock...id have to check it only every 20-30 km but it still didnt come loose...it only stripped one screw on it it was so strong...(blue threadlock)....it was a dream...