I have noticed that I get a really bad smell and smoke from my exhaust after riding for a while, when i shut my kfx down a small trail of smoke comes out and it smells like a stinky car with a plugged cat converter on the interstate, you know the one you hate to follow. I checked my coolant and the level has been staying the same. The fan isn't running more than normal. also when it is at idle for a while or you are just putting around the yard and you go to get into the throttle it cuts out some till you rev it up. This is also the first time I have put fuel in it since I bought it a few weeks ago. it has a new top end(piston,jug,etc) Any Ideas??