i just bought 2003 660 raptor i noticed the chain adjustment mark on the left side(opposit side of the caliper) is worn off. i have a ruff guess of where it is supposed to be but i don't want the axle out of adjustment. any ideas of how to get the adjustment dead on. can someone post a good quality pic of of their chain adjustment marks? or better yet is there a way i take a ruler and measure each side to make sure the axle is even on both sides. the numerous marks on the swing arm are fine its just the marks on the left side of thecarrier

 

There is very little play from side to side on the 660 where the axle could get out of square. I just get the chain adjuster screws the same length on both sides and rock on.

 

so to tighten the chain you would just loosen the nuts on the 2 bolts located on the swing arm and tighten them in?