Was this the first time you'd ridden it since they put the wheel back on? What's the history of the bike? Did you buy it used?
Would it be possible to put the spacers on the wrong sides? It seems if they did that, the brake disc/caliper wouldn't line up. I wonder if they failed to put the left side spacer back in? Might be wrong, though, I've never done it.
I suppose stranger things have happened, but the timing of this "failure" makes me think they didn't put the left side spacer back in. It would be hard not to notice the right one being gone. Not saying a bearing can't fail due to neglect (i.e. a lot of water crossings, previous owner not putting enough grease in it or having a brain fart and putting it back in with no grease at all) but the timing of it happening right after it was reinstalled is most likely not a coincidence.
On the other hand, if a spacer were left out and the wheel tried to migrate left or right, wouldn't it bind up the rear brake? Doesn't the bracket that the rear brake caliper is attached to slide in a groove on the swingarm that allows it to slide fore/aft but would prevent it from moving left/right with the wheel, thus causing the disc and caliper to bind to the scorching point?
It seems leaving one of the spacers out would allow contaminants into the bearing, but would it allow the bearing to migrate out of the wheel or fling out all its grease in such a short time? (Don't know how long the ride was.)
I'm with toslow. I don't trust the buffoons at shops. Even if it weren't part of the prescribed "procedure," any mechanic (or "technician") worth his salt would have at least stuck his fingers in those bearings while the wheel was off and turned them to check for any discernable play or binding.
I'm sure if the bearing was that close to failure, a finger and brain would have recognized it, but I'm sure they didn't check them otherwise they would have been trying to sell you a new set of rear wheel bearings.
Anyway, my above-mentioned scenarios are questions more than statements of facts. I'd never really thought about the results of an improper rear wheel install.
How bad's the gouge in the swingarm?
I'm sure I'm not the only one who's interested in hearing the final verdict on this if you're able to figure out exactly what happened.
Last edited by planalp; 06-11-2013 at 08:11 AM.