I recently discovered the easiest way to find air leaks on a bike, snowmobile, anything with angine; with a set of torches just turn on the oxygen and wave it around all the gaskets top to bottom. If there is an air leak the engine RPM will increase. Just make sure you ONLY turn on the oxygen and not the acetylene unless you're on a suicide mission. ------------------ Me? I'm 15. I ride a 2000 YZ 426, and I luv it! In the winter, I ride a 1996 Yamaha XT 600. My whole family rides dirtbikes/quads and snowmobiles, even mom.