If you have a 650 Vstar, please take this advice! Make sure you pull the rear wheel and lube the splines where the driveshaft connects to the final drive. Yamaha recommends this to be done any time the wheel is removed, and/or at 15,000 mile intervals. Mine made it 12,000 miles and the splines stripped. I did a bunch of reading and it seems this is a common problem, as Yamaha did not use enough grease from the factory on some bikes. Don't chance it. A new final drive from Yamaha will set you back around $650, and if you can find a used one, they are going for at least 1/2 that amount. It's very easy to do, or spend the $40 or so and have it done at your favorite shop! It's no fun watching your bike ride away on a flatbed and waiting for parts to arrive while all your buddies are out sticking their face in the wind!