fI you are not riding to the limits of traction I would say your 9 year old tires are fine.
Dont let the cracks in the rubber bother you. The rubber is not what holds the tires together, the corded 'belts' are what gives the tire its strength. The rubber is what provides the traction.
If your back tire is original 8k miles its close to the limit of wear anyway. google MC tire wear bars and see if yours are showing. If so its time to replace the back one (at least). Usually the front tire lasts twice as long as the rear.
I got my last set of tires for my VS650 at bikebandit online. Good prices and I was able to get the exact Original Equipment Manufacturer (OEM) tires from Bridgestone that they put on the bike when its new. I had to search the site a bit, just putting in the bike model number did not cough up the right tube-type tires for my bike, but by looking at each Bridgestone tire of the correct size I was able to find the right tubed' tire. Shipping was really fast. Your owners manual will tell you the exact Bridestone tire "model" that came on your bike from the factory.
Dont try to save a few bucks by getting Dunlop tires or any other cheaper brand. The OEM Bridgestone tires a very good, and the bike will feel the same, a little better actually because a new tire is heavier than one that is worn out. If you are really into pushing the bike to the limit then you might want to look for even better rated tires (more $$$$$) . I cant help you with that.
If you feel comfortable wrenching on your bike you can jack it up several different ways and get the wheels on and off. If your fender extends over the back of your wheel, you will have to get the bike a couple feet up in the air to get the wheel out from under the fender, or take the rear fender off the bike. There is no trick or secret to taking the wheels off yamaha bikes, and no special tools are required. I do recommend you have a torque wrench for putting the wheel nuts back on correctly.
Before you pay someone else for the joy of wrenching on your beautiful machine, at least read through the service manual pages on taking the wheels on and off, or check Youtube and see if you can find a video for your bike. If nothing else you will see what you are paying someone else to do.
Last edited by KCW; 11-07-2016 at 07:12 PM.