brakes binding?

[UKRedwing]

Hey guys, I fitted some armstrong wavy disks on my srad because the standard ones were shagged, fitted ferodo pads at the same time because it voids the disk warranty if you don't use new pads. Anyway I knew the brake calipers where gonna be abit of an arse to get back on with fresh pads and brand new thick disks but I managed it after spacing the pads out. Now the pads are rubbing against the disk, its all really tight and I thought it might take a few miles to wear the pads down and then it will all free up but I've done almost 100 miles on A roads since and it hasn't loosened up, its actually hard to push the bike around cus the pads seem to be binding and the disks are getting REALLY HOT. Think I'm gonna take brakes back off and push pistons back in, ideas??[/list]

[The Artist]

Remove callipers and brake pads, pump brake pistons out a bit, clean all the crap out from around them. Push back in.

Remember to make sure the brake fluid reservoir always has fluid in and it doesn't go everywhere when you push the pistons back in.

[UKRedwing]

Hmmm don't really want to take pistons out completely, will pump them out alittle bit and clean them up but the brakes were fine and not binding before I changed pads/disks :/

[The Artist]

[Dazbo666]

+1 Clean out any crap from around the pistons.

(I've been advised previously to put some copper grease around the pistans too?? but obviously be sure not to get any lubes on the pads or disks)
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[The Artist]

[UKRedwing]

[Paxovasa]

[bacon]

+1 to cleaning everything properly.

All the pistons should all be relatively free moving, you shouldn't have to struggle too much to press them back in again. if there is too much crap stopping them from moving in and out freely then binding is something that will happen as a result.

And yes to confirm, don't put copper grease on brake pistons, copper grease goes on the back of pads and on the pad pins to stop it siezing. Red Rubber grease however does go on pistons (and seals).

This is a total long shot.....but check also that you haven't got too much brake fluid in the res, bit of a random one, but if you had the brake fluid level up nice and high before you changed to nice thick pads and discs, its possible that by pushing them in, you could have maxxed the reservoir out?

[Walloper]

Remember how much material is on the pads new and how much is left after 10,000 miles.
You will not rub much material off pads to bed them in.

You should have cleaned the pistons or even overhauled the calipers.

I hope cleaning the pistons and digging the shit out of the caliper helps.
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[UKRedwing]

Well I cleaned them up best I could and the binding problem is gone
Calipers are in quite a state though lol, getting new piston seals at work today then I will be taking pistons out completely and cleaning it all. Needs flushing anyway the brake fluid is pretty grotty.

[prawny1]

binding brakes are usualy caused by dirt/rust on the pistons or corrosion build up behind/under the seals.

You can just remove the pistons and seals, clean up the seal grooves and piston then using rubber grease refitt the seals and pistons.

You will need to re bleed after but the brakes will be as good as new, even leaky seals are more often than not cured by the above method.
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[Wilson12345]

Happened with me, it ruined my brake discs cause I left it for so long :l Took a lot of cleaning too
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[Souleh]

Echo about the greases - Do not mix these up..

Red rubber grease is the only grease you should be putting around the sides of your pistons and on your seals.

Copper grease amongst others will swell the seals and damage them leading to their death or yours if as someone has told me before, he had serious brake binding after someone did this.

Honestly.. brake bleeding isnt hard, overly technical or beyond the realms of anyone whos an ounce of common sense so get a bleed kit or make your own and get on youtube for videos of how to bleed them. Itll make them so much better

Just coming into the better weather is the best time to get all the salt and crap off them, give the pistons and calipers a good clean up and be sure youre riding safe for coming into season

If you do make a balls of it - were all here to help and giggle a little.. but mostly help

[UKRedwing]

Debating whether to just get new seals (stupid supplier does them in sets of 5 for some reason though )
Or
whether to buy new pistons aswell (not sure how bad the pistons are without getting them out completely and cleaning them)
Or
Can just get brand new Hi-Max calipers with pistons seals etc for £75 each and chuck them straight on the bike :/

[Souleh]

9/10 times you wont even need new seals, just a clean up.

Depends if youd rather spend money than do the work, if your time is worth more than buy them

[UKRedwing]

Seals are gone on 1 or 2, visibly popping out the piston. Don't really want to fit new seals if some of the pistons need replacing in which case it starts getting expensive to the point I might aswell have new calipers ready to go. Gonna sleep on it I think

[chris-red]

Silicone grease is fine to use on pisstons and it is what Yamaha Suggest.

If you don't use grease it will just seize again.
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[UKRedwing]

GOnna get some of that grease where do you guys get yours? Halfrauds?

[bacon]

[prawny1]