WR450 '05 model New O-ring chain and high quality sprockets, correct chain tension of 40-50mm measured from the screw in the chain schain is still "wandering" side-to-side with enough force to grind the sub-frame? &%$#@!! A quick search revealed a few others with this problem but no real fixes. I tried a ty-wrapped an old reinforced fuel line tube on the subframe but the chain soon wore thru that. Alignment looks OK when a straight edge is set along the swingarm as do the chain adjusting blocks. I've never seen so much side-to-side motion with a new chain, anyone any ideas as to the best fix other than increasing the tension and risking damaging the the countershaft?!!