I was trying to tighten my 05 450r chain. I took the 4 pinch bolts out and cant get the carrier to move frontwards or backwards. Any ideas? I tapped on it with a 3 lb sledge and to no avail

Stick a longer screwdriver or extension through the sprocket, and roll the bike back and forth.

You can also pick up the rear end and it will make it easier to turn.

-Kip

If you haven't been, use a torque wrench when you tighten the bolts and it'll likely never get stuck again.

i snapped one of those 4 bolts that you tighten so the carrier dosent move..... what kind of bolts are they? and where if possible can i get a replacement? thanks itd be great to get my 450r back up so i can ride this weekend.

bad bearings can make it hard to turn, if the 4 allen bolts are loose and your hitting it with a 3 pound hammer and its not moving then something is up