I installed acer hand quards on my 2006 YZ250F & YZ450F last night. They are the ones that do not bolt to the end of the handle bar, and are mounted on the handle bar only. I took a little time but when done the quards are a little low. So I wanted people to know before they purchase a set they rotate with the levers. There is not much adjustment because they just clear the brake and clutch lever assy. Over all I am happy I did it, but wish they could rotate up a little more.