I just changed the rear tire on my '07 WR450. Not sure how tight I need to make the rim locks. I looked in the manual and that is the only torque setting that's not in there anywhere I could find. Obvisously I want them tight enough where the tire don't slip on the rim but I'm worried about over tightening them. They are made of what looks to be cast aluminum and I'm afraid that if I go too tight the bolt will break right out of the center of them. So, how tight should I go with 'em?