I've got a pretty decent yamaha/honda shop up the road who have sold and mounted two tires for me. One on the 650, one on the 950. No problems yet. After considerable checking around, the difference in price wasn't enough to make me drive a ways to buy a tire for a little less here and have it mounted elsewhere.
Improper balance didn't worry me as much as misalignment. My concern is that just ever-so-slightly cattywampus might not be noticeable until you see excessive tire wear, drive shaft or belt wear, mileage drop, ... I look at the wheel, the alignment marks, and belt but never really feel at ease until I've gotten a reading on mileage and some miles on the tire.
Anybody ever have a problem with rear wheel misaligned? I don't think I've ever heard anybody complain about it.
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