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Author Message   Jbarron Posted on Monday, January 30, 2012 - 04:10 pm:        Guess this is just another common issue on the 1125. Don't use the rear brake much anyway. Noticed when I went for a ride last weekend the rear brake felt hard so I left it alone. Stopped for gas to make sure it was not locked up and headed out for some fun. When I got back I messed with it and got it locked up good. Piston went in and will not return. Ordered a new MC. Loving the spring weather in Texas!   Jdugger Posted on Monday, January 30, 2012 - 04:46 pm:        I had one lock up, too. It's not the worlds best piece of hardware.   Zane_t Posted on Tuesday, January 31, 2012 - 07:35 am:        I had mine lock up last Fall. I ended up replacing every rear brake component as a result. One thing I did notice was the rear brake master cylinder reservior was full to the brim, possibly agravating the problem. I made sure the brake fluid level was lower when I replaced everything.   Dirty_john Posted on Tuesday, January 31, 2012 - 11:53 am:        Have a look at my earlier posts on this subject, I gave the part number for a Brembo rear m/c which is a direct fit and cheaper (here in the UK) than a Buell OEM part (Message edited by Dirty_john on January 31, 2012)   Mechanicsn Posted on Tuesday, January 31, 2012 - 01:08 pm:        Don' forget to order the correct banjo bolt if you go Brembo, the factory line will work. I had a Brembo caliper but I've gone back to the stock caliper.   Smoke4ndmears Posted on Tuesday, January 31, 2012 - 02:39 pm:        why did you go back to the stock caliper?   Rogue_biker Posted on Tuesday, January 31, 2012 - 03:58 pm:        When my friend owned my 1125R, he never used the rear brake. He told me never, not even once or twice. It ended up seizing and to overheated the rotor. Buell paid for replacing everything but the calipers (it was rebuilt). I have had mine for 8k miles and one year. I use my rear brake ALL THE TIME. No issues. I do notice every morning the rear brakes are pretty slippery until after the first application. My guess is from the exhaust soot on start up. I wonder if the exhaust soot build up is responsible for seizing up the rear brakes on 1125R's?   Timebandit Posted on Tuesday, January 31, 2012 - 04:07 pm:        John, got a link to that part number?   Smoke4ndmears Posted on Tuesday, January 31, 2012 - 08:27 pm:        brembo p/n 20516143 seems like 20516171 would be better with regard to bleeder location. (Message edited by smoke4ndmears on January 31, 2012)   Timebandit Posted on Tuesday, January 31, 2012 - 09:01 pm:        thanks   Dirty_john Posted on Wednesday, February 01, 2012 - 02:02 am:        Timebandit - I am away at work all week so can't get hold of the part number, some time ago I did start a thread on this forum and listed the part number then, I will try and dig out the part number for you at the weekend   Smoke4ndmears Posted on Wednesday, February 01, 2012 - 03:57 am:        the ***143 number is the one from your earlier thread.

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