I purchased a 5 year extended warranty on an atv from a dealer in AZ about 4 years ago. This warranty was explained to me as I could perform my own maintenance and add any aftermarket parts. I put an aftermarket air filter made by uni on the atv. 2 years later the atv's top end needed to be rebuilt. The warranty company covered the costs. I then put a k&n filter on the atv and now about 1 year later the top end needs to be rebuilt again. The warranty company is refusing to cover this. They say that the addition of an aftermarket filter contributed to the problem and not a defect. When I asked them why did they cover the first rebuild with an aftermarket filter installed as well they said "well i guess you got one over on us then." The adjuster Mark Reese was very rude. He actually asked me if "I read the english language." What a terrible thing to say. He was being very rude and even encouraged me to follow up with the BBB and the Attorney General's office stating he "is an independent adjuster for the warranty company and it wouldn't affect him" and "it's not going to do you any good. We've won 4 or 5 court cases just like this." I then spoke with Greg at the corporate office who wasn't any better to talk with. He had an excuse for everything. "It's a 4 year old bike." He says. I told him I bought a 5 year contract what does that matter. Fact is, this company is trying to get out of their commitment to fix my atv.