Hey guys,


Having an XT660 2014 model here. I fitted new brake pads, then I tried to bleed the brakes, but my hose leaked air and I think I sucked in sme air. Slightly spongy brakes but its alright Ill have to fix it later today.


The issue is: I drove 10 km to my job today and noticed one brake being very hot and the other cold. So the left brake disk is dragging to the newly added pads. How is this possible ? I think I might not have pushed back the calipers well enough and so they might be stuck a bit ? I cleaned the pin and everything with dusty cleaner so it should all be very well cleaned and proper .. Any idea please on what to do ? Driving like this isn't really healthy for the discs. Also when fitting new pads is it normal they drag a bit at start ?

When you use new pads on old discs the pads will be perfectly flat/square..the old disc wont be as it will have many thousands of miles use hence its worn..it will take a while for the pads and discs to wear in together.

You may also find the disc is no longer 'true' and runs out causing it to drag if the caliper has been stuck before/overheated causing it to warp.

Personally id strip the offending brake down and re clean it with brake cleaner and silicone/red rubber grease on any rubber/boots and copperslip in the pins and back of the pads...AND I'd sort the spongy brakes asap.

I will reclean it today , debolt it all againe , see if it actually works and if it is stuck or not. What substance do I apply on the calipers ??


The rest is greased as the bike is in pretty good shape m, no rust no bad road conditions like offroad and in general no rust. the spongy brakes I don4t know how it wont get solved.



I pump up the brake , push the lever and hold it tight , open the outlet valve air comes out and fluid but a lot of air and almost no fluid , then I quickly close the valve again and loosen the brake lever after that , more and more air gets in to the bike as I do it , I also notice that the vacuum pump with hose is sucking in air past the valve because it doesn't shut off 100 procent , I think this sucks in air into the system then .. Veery strange for such a simple job ... In the meantime I always open the top reservoir to let in and out of air on the top ...


any tips or how to video would be nice because I watched on youtube but don't get the sponginess out even not with the vacuum set ...

http://www.ebay.co.uk/itm/VIZIBLEED-...8AAMXQNo5TY41J

I have used this with good results...tbh its as effective to use a piece of clear silicon tubing that is a tight fit over the bleed nipple.

You only need to crack the bleed nipple open a 1/8 or a 1/4 of a turn.

Im not to clear if you are allowing air into the system from the top res..ie by letting it bleed dry and drag air in

I always had fluid into the reservoir, I noticed that I had to open the valve for atleaast 1/4th or or even more before fluid came pouring out. Maybe too much open then ?? But as long as I don't loosen the lever it shouldn't pull in air I thought ? Maybe that's the mistake then ... ?

RE the offending caliper/potential sticking piston.. I spray brake cleaner directly around the pistons to wash away any rubbish ..I also pump it out to past its usual position when the pads are out to make sure everythings clean.

JUST BE CARE NOT TO POP IT OUT!!

I assume it wasn't a problem before you stripped them down?..

End of the day you have to open the nipple enough to allow fluid out obviously..Im not saying you had it too open that it allowed air in. TBH sounds more like the bleed tube is loose around the nipple.

you could try tapping the caliper/brake line to dislodge any trapped air. Another option is to leave the res top off overnight with the brake lever held back to the bars..I use cable ties.

Well I bleeded for 2 hours no luck and went to a friend and he couldn't figure it out either. Our thought is that the nipples are either leaking or they take in air through the threads. Took out a nipple and cleaned it ... no result ... I still have one hot caliper. Will reclean and then apply special grease for the calipers. No luck so far , if I can't fix it today I'm bringing it to the dealer I have no clue whats wrong ....