Before a quick ride across town yesterday, I pulled out my spanner wrench and dove under my bike to crank the read suspension down a couple notches, but found that the wrench just...wouldn't grip. If you've ever adjusted the rear preload on your 500, you know how cramped it is back there - at this particular preload setting, there was only one angle at which I could insert the wrench to grip the shock and subtract preload. I found that I could add preload, and then take that just-added preload back out, but once I reached that point, there was only one adjustment slot that I could grab with the wrench to remove further preload, and that one slot just wouldn't hold on to my wrench
(I've had this bike since January of this year, and between solo rides, shopping and riding with my girlfriend on the back, I end up adjusting the rear shock about half the time I hop on - in other words, I've performed this operation successfully many times, and feel confident declaring an impasse)
Frustrated and delayed, I shoved my camera underneath the bike to get a better view, and found this:
The pictures are a bit rough (I had to contort myself into yoga pose just to get the camera back there), but you can see that two of the adjustment holes on the shock are significantly worn on their right sides - instead of a sharp squared edge for the spanner wrench to grip, there's just a nasty rounded mush of worn steel. This would explain why I couldn't remove any more preload - the wrench had nothing to bite on. (These pictures were taken from the left side of the bike)
Here's my question: has anybody else encountered this issue?
I'm posting in the Warranty section because this sure seems like it merits a warranty replacement: my bike has only 3500 miles on it, and I can no longer adjust the rear shock to suit solo riding. The dealer that sold me the bike was dismissive on the phone, but did agree to take a look in a couple days. In the mean time, if anybody has encountered a similar issue, or has any other thoughts, I'd love to hear about it!