I have a brand new 400 xc-w 2009. For a couple of days now I've been putting some hard equipment parts to protect my investment(investment right! ) Tonight the only thing I did is put a neoprene for the rear shock, a case guard (for the cluth piston) and greased the 2 adjuster bolts of the rear wheel. And now, the chain won't turn freely...I thought it was the wheel that was not align...nop...it was good...i remove the rear wheel and try to turn the chain with my hands and it' was very very hard to do so...***??? thanks!