Ive been using a DID ERT2 chain and aluminum rear sprocket but would like to try a longer lasting chain, just worried about the extra width of the chain hitting the cases. I've used a Regina ORN6 on a previous bike and it never needed adjusting. Anyone with a 05+ yz125 running any of these chains? Primary Drive Xring DID VT2 Xring (narrow but expensive) Regina ORN6 Renthal R3 RK EXW XWring I ride/race MX 99% of the time and wash my bike anytime its muddy. If the xring chain and alum sprockets still arent holding up I'll try the ERT2 and steel sprockets to see how that compares. If I'm still not happy I'll just do the xring/steel combo and be done with it.