So a little history got the bike in parts and put it all together started her up a few times and it would die after 1 min or so. then I started it and it seemed pretty good and it was like the throttle stuck and reved way up I tried to shut down with the kill switch and it wouldn't shut off, pulled the coil wire and it kept going for a little bit, then turned off the gas, then I hit the throttle and it died. It was pretty scary thought it was going to blow up. its around mid 30's to 40,s here in wa, mixed gas 20:1, no air filter(will order one) and the exhaust is zip tied up to the frame but on there pretty good main jet was 142 and stock exhaust, I have all fresh coolant and gear case oil, and no chain hooked up just was trying to see if the motor would run, like i said it was all in pieces. Please help with any suggestions......