I have found what works everytime. I got the OFNA truggy starter box CEN says their racers use. I took out the spacers on the engine mounts and dremeled the slot. I crank the engine at hign rpm without mercy to start it. When its hot I juice the throttle (while I spin it and spin it) I have never go home anymore because I can't start it. I would really recommend getting rid of the pull start ASAP and not trying a jury rig roto start. Be cruel with the starter box and it will always start.