Guys I had a 06 I bought used and had it at the dealer last year for new tires and he asked if I had a Yamaha rear trunk to go with the side bags, and I did. He then asked if I new if the updated rear rack had been installed under recall wty, I didn't know, so he got the vin numbers off the bike and ran a check and it had 2 recalls that had not been done and one was updated top case mount, the other was for the ground wire....
So maybe check with your dealers about any recalls that your bike might be due and hasn't had it before you buy the new brackets.
Hey it don't cost a dime to ask and you might get it free and installed like I did !!