Hello, just joined --I wanted to know what the heck i'm doing wrong with the above trimoto. I rode the bike, it worked but noticed a "rattle" inside the motor, --it was the clutch-side main bearing. I took the engine apart, replaced both bearings and seals. put it back together and it won't start. i replaced the stator, the CDI, the plug, and it still won't run. Now i'm wondering if i got the piston in backwards?? the slots in the piston are turned toward the carburator side, the piston has an arrow on top and i pointed that toward the front tire. I spin the engine with a large drill and still it pops shoots a little fire out of the exhaust but still will not start---so,--what's wrong>>>??? - Kinder - thanks for any input