i went to the track saturday with my turmoil and ran for a couple of hours with my cousin and his 8ight. had some fun. let my cousin drive and he jumped it full speed and landed and ran into a stake. bent the muffler but i managed to bend it back and continued to run it. later i came in to get fuel and found out that my air filter had fallen off, no telling how long it was off for. so i took of the heat sink to check it out and there is a scratch on the top of the piston head. im gonna polish it up and see if i can smooth it all out. i also managed to lose a heat sink screw(before i decided to take of the heat sink) and burnt 2 glow plugs.