Rear brake seized 2013 M1100 -Problem found!

[Skybarney]

Ding Ding Ding we have a winner.

Locknut AWOL, yes?

There is only one lock nut on the switch post.  It was loose and I suspect that every time I used the brake that post backed out a bit. Eventually acting like I was dragging the brake.  Needless to say it will be getting some Loctite when I get her back.

[Raux]

dont use locktite on that

just tighten it up to the proper tq

[Skybarney]

dont use locktite on that

just tighten it up to the proper tq

Like the factory should have?      

I can see what you are saying though.  Without something to grip the post locktite would force me to remove the pedal every time I needed to make an adjustment.  I spend a fair bit of time checking bolts before rides and it will be the last time I don't check that one!

I am actually kinda happy to have figured it out.  Maybe a hassle but it feels like a bit of a win 

[Raux]

our bikes vibrate a lot

tends to back things out even if properly tq'd
ask me how i know

but locktite where it shouldn't or needn't be makes any adjustments or disassembly/service later a pain and in many cases can lead to broken parts/stripped bolts/etc

[oldndumb]

There is only one lock nut on the switch post.  It was loose and I suspect that every time I used the brake that post backed out a bit. Eventually acting like I was dragging the brake.  Needless to say it will be getting some Loctite when I get her back.

Hmm? Wouldn't the brake light have been on constant, or am I misunderstanding? If it was indeed on constant, being rear ended was immanent.

And ditto re ixnaying the locktite for that location.

[Skybarney]

The switch activates when you press the brake pedal because the post comes away from the switch.  It came on as I used the front brake and came on when I used the rear.  Right up until it got tight.      As loctight is ill advised I will add a second nut so that I can tighten the two nuts against each other.  At least then I will see the post moving up since the nut is not sliding down.

It will be a normal part of my normal pre-flight inspection from now on.  Although, I am still somewhat amazed it worked loose, every time I was using the brake it loosened up just a bit until it finally drug enough to toast it.


Not sure that made any sense.

[oldndumb]

Forgive me, but I am still confused. It has been a while since I have looked at a stock rear brake setup, but the principles are usually the same.

Seems to me a brake switch that has moved out of adjustment, as you describe, would have had to reposition to an increased extension in order to affect the pedal position, and doing so would have had to exert a fair degree of torque to displace the pedal.

Normal procedure is to set the pedal position/free play to spec via the adjuster screw. If the pedal free play can not be set to spec, then the mc rod length would be the next adjust point.

Of course all of this is crap if I have totally misunderstood your problem description?

[Skybarney]

The adjuster that handles free play (and the stoplight switch) worked it's way up out of the hole on the pedal.  It reduced free play.  I did not notice it right away as I barely use the rear but after slamming a few backroads hard enough to drag a little rear brake the free play went away.  End result was light brake drag until overheating and fluid expansion slamming the brakes tight.  IMO I should have figured it out the first time   

[oldndumb]

Gotcha now. 

[Skybarney]

The rear brake disc, pads and hoses were covered by warranty.  Duc must be aware of the issue and they are took care of it.  Luckily I got the bike back today as they shipped the parts right before the famous Italian vacation.  Whew dodged a bullet on that one!

[Howie]

The rear brake disc, pads and hoses were covered by warranty.  Duc must be aware of the issue and they are took care of it.  Luckily I got the bike back today as they shipped the parts right before the famous Italian vacation.  Whew dodged a bullet on that one!

Brake wear is not covered by warranty, brake defect is.

[Skybarney]

Luckily the dealer decided that the adjuster should not have backed out and they replaced everything for me at no charge.

Pretty cool 

[Barney]

i had my bike at the shop over the weekend for a new pair of shoes.  while in, the tech noticed air in the rear brake lines - i'd noticed more pedal travel then normal, but the brake still worked and i typically only use it to set myself up in the corners or when stopped as well, so i never really thought anything of it.  anyway, moral of the story is the service manager told me he'd have covered bleeding it under warranty if it hadn't just expired. i suspect he was just blowing smoke up my ass, but i was surprised none the less...