This last weekend, I went riding with some friends and some others that I'd not ridden with for quite a time. One of the people that I'd not seen for a while had a Raptor. We spent quite a bit of time trying to get his quad to run decently. He'd abused it so much that it ran like crap... when he could start it. We had to blow out his jets and clear his breather tube and it still ran shitty. It seems that he'd also been running without an air filter for some time and all the crap that got sucked up into his motor left it without much in the way of compression. I took my tow strap with me when he rode with us because we didn't know if he'd make it or not. His 9yo son had to tow him back to camp because it stalled and wouldn't start. That's what got us working on his quad in the first place. It's just sad to see someone treat their quad that way. He wasn't running with an air filter because something broke... filter cage or clamp or something... I didn't look to see. So instead of repairing the air filer stuff, he now needs to rebuilt his motor.