I have been having problems with my stock chain staying tight. I have it set 2 notches past 15 and at that adjustment I had about 5/8-3/4 inch of slack. The chain is on its 2nd season of hard riding so I dont think it should still be stretching. Ive torqued the main bolt to 66ft lbs as stated in the manual. I have no idea whats going on...I recently just noticed that trailering it may be stretching the chain, I strap it down on a snowmobile trailer and noticed the chain is tighter when all strapped up. Thats the only thing I can think of...Anyone else having similiar issues? Maybe its just from riding?? How often do you guys have to tighten your chain? Is there a chance my chain is junk? What are the signs of wear on these chains that are visible? Its always been cleaned and oiled. Everyones opinion/expertise would be greatly appreciated.