OK guys. I broke my hub on my '04 from having the chain too tight, so have been extra careful with my '06-to no avail. Bike has about 30 hours on it, chain was adjusted correctly, just entered the track onto a table-top, so landed a little flat as I grabbed third gear, and the rear wheel locked. My broken hub looked exactly like the last guy's I saw in here. Busted neatly all the way around, near the spoke holes. Only guess is spokes were too tight, but again, after doing this before on my '04, I'm very, very careful with rear-wheel adjustments. So I know most believed the issue was chain too tight, but I guarantee this was not the case this time. I'm beginning to think the hubs on the 450's are just a little under-engineered. Ended up with a jammed knee (very lucky), but otherwise am fine. Don't worry, I'd never trade mine in for a Honda!