Alright I hate to ask this question. I have found a new home for my 06 Polaris 900 RMK 155. I have put over 800 trouble free miles on the same $80 dayco belt I put in when I bought it. I am about ready to pull the trigger on a brand new 2010 800 dragon. after reading all the issues on here im thinking a 800 doo doo might be the route to go. I have been offered a 4 year bumper to bumper warrenty. Will the warrenty still be good if i put on a can or do the pcv and autotune? Has anyone put these items on and actually had the dealer deny warrenty. So what I thought was going to be a easy decision is now not so easy. I have a big heavy sled that makes a pile of pwr. Sure it might twist a crank some day but it is also half the money.