so i was riding along the atv trails in northern Maine when my brother told me that my quad was smelling like a 2 stroke, because it was burning oil, we only had about 10 miles left to get back to the cabin so i just got their and decided to check out the machine. couldnt see any damage from here but we had to go home because hurricane irene was about to hit our home town. (long island) when i was finally allowed to check out the machine again i still couldnt figure out any problem so i brought it to my a local atv shop and he performed a leak down test on it and said nothin seemed to be wrong the compression was fine. he also told me he didnt have time to fix it. so i decided to bring it to a different shop and have them look at it. meanwhile while this was all happening i was getting ready to leave for hatfield mccoy.(we are leaving this wednesday the 28th) finally i got a call from the shop telling me that i needed to bore nout my quad get a new piston, rings, and all four valves. he told me the problem was because my air filter was dry and fine sand was sucked into the engine and sanding down my cylinder from the inside. when i was riding the quad before all this happened i did not feel a power difference, and wouldnt hav known anything was wrong. wanted to share with you guys and see what you think and always remember to check your air filter, it is now a routine thing for me to do.