I have a 2002 yamaha blaster. I was riding and i was in third gear i beleive and it starting putting down and i looked behind me a cloud of smoke came out of my muffler and still smoking really bad plus it smokes where the pipe goes into the motor. My buddie that knows everything about blasters said the only thing that would cause that is if the tranny went or the case cracked but it wouldnt run. It still runs and moves but smokes really bad and i dont know why.