I was riding my blaster. And it was completly fine untill a little bit in and it started bogging and then it died. I took it home and there was oil leaking from the exhaust port. I took the spark plug out and half of it was burnt and half was fine? I noticed the ignition coil was loose so I screwed it back in, then put a new plug in and everything. then tried to start it and it started for 2 seconds then died. ? I need help . Thanks