Do your Tires talk to you

[Wizbyu]

Yes your tires Talk to you, looking at the photo you can see there is a Rebound problem raised edge, I get around 3500 miles on a set of tires, buy the end of it's life there is a small edge there but not to worry I know the rebound is not where I would like it to be. I have a 2011 BMW shock with a 2005 CBR rear spring on it, BMW spring is around 450 lb spring CBR spring is 700 lbs so it will over power the rebound just a tad, but it is very close to being OK , when the tire is done there is a little edge, This tire has 600 miles on is so what is going ?

The answer is the nut on the shock backed off to the point of only 1 thread holding on, shim stack for rebound and compression was not working like it should, tire ware shows something is not wright . So I replaced the shock with a spare I had same shock ( BMW 700lb spring ) for now , I'm rebuilding the one that came off adding more shims to Rebound side to get a tad more adjustment. Note the BMW shock is made by Sachs and there was no thread lock ( locktite ) or pinging / staking of the nut , after reading some of dirt bike forms the Quality control Is lacking with Sachs. I put this out there so as to let people know that your Tires maybe Warning of a Disaster in the future, I am lucky It did not come apart , I check my air presser and look over the tires along with the whole bike before each ride.

[isleoman]

That gold wheel don't look Gen 1. Where on the BMW shock is that nut located? The bottom? I have the 2012 S1000r BMW shock with 700 lb eibach spring on my spare Gen 1. Would like to know where to look. I love that 700lb. set up for two up riding. For just me it's a little too firm.

[Wizbyu]

[Wizbyu]

You have to tear down the shock to see if the nut is coming off

[isleoman]

OK, thanks for the pictures. The end with the clevis and the body can't turn so just the up and down action of the shock loosened the nut, do you think the heavier spring was the cause? Or do you think it would have happened anyway. Had you taken that shock apart before?

[Wizbyu]

I think they missed something as in thread lock or didn't pin the nut. I had not taken the shock apart till now and then found out what had happened , I have done lot's of shock rebuilds but never seen one come apart like this all the shocks I have done were pined or staked and some have stover nuts and some thread locker to help keep it all together, most the time you have to grind the nut off or split it to remove it and you always have to use a die to clean up the threads to reassemble it. Had it come apart while riding I don't think it would separate do to the linkage but it would most likely dump the oil on the rear tire.

[Doc Samson]

Wow, good catch!

Have watched a few Dave Moss vids and wish I had the ability to read tire wear like that!

[Wizbyu]

Yes Dave Moss knows a lot about tires, I had him help me set-up a track bike, he showed me what and how to do It since then I have never looked back that was back in 2012 at Laguna Seca