The dealer can't do anything illegal or encourage you to do anything illegal. However YOU can do anything you want to YOUR bike, as long as it passes any tests your state might have, or you are willing to take your chances. The dealer is fine with that. They aren't going to scold you and make you feel bad because they want your business. Besides, if you screw something up you probably will pay the dealer to fix it for you. Everybody is happy.
On the 600 mile service the dealer probably checks the air in your tires. Don't forget that valuable and skilled service. <Now removing tongue from cheek>
John
