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 Brake pad wear 
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TRAIL BOSS
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Joined: Mon 17 Oct, 2011 7:37 pm
Posts: 271
Location: Cooroy
Post Brake pad wear
Just pulled the front brake pads out - first time I have done this since buying the bike, had a look from time to time, but never pulled them out.
Is there any particular reason why the one on the piston side has worn down so unevenly and the one on the other side is fine?
Is my caliper no good somehow?
Cheers, Dave.


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Dave
08 WR 250F
Tue 26 Jun, 2012 5:14 pm
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TRAIL BOSS

Joined: Sat 05 Nov, 2011 8:26 pm
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Post Re: Brake pad wear
the caliper slides are seized or not sliding freely
bolt your caliper on your bike without the pads can you move the caliper in and out it should slide towards the rim and away if not your slides are seized crybaby2 this can be a pain to fix if left too long


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Tue 26 Jun, 2012 5:21 pm
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TRAIL BOSS
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Joined: Mon 17 Oct, 2011 7:37 pm
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Location: Cooroy
Post Re: Brake pad wear
Cheers. Just checked, slides fairly freely but a bit stiff maybe. How freely are they supposed to move??
There are rubber boots over the shafts, one of them is broken, might have let a bit of crud in.

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Dave
08 WR 250F


Tue 26 Jun, 2012 5:38 pm
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Post Re: Brake pad wear
yeah i cant seem to wear a set of fronts out , yet i use em alot ..

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Tue 26 Jun, 2012 5:44 pm
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TRAIL PORN STAR
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Joined: Sat 22 Aug, 2009 11:11 pm
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Location: Brisbane
Post Re: Brake pad wear
Normal if you ride beerwah alot,

I seam to do this to front pads also and I allways service and clean my calipers out,

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Tue 26 Jun, 2012 5:58 pm
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TRAIL BOSS

Joined: Sat 05 Nov, 2011 8:26 pm
Posts: 280
Post Re: Brake pad wear
pull the caliper right off the bracket buff the pins or hit them with the wire brush, spray heaps of cheap wd spray in the holes to get the gunk out, if the pins are worn they can cause the caliper to stick , lube with lithium grease, these slides fill up with poo all the time and are usually negletcted by most of us , should slide quite smooth with an even resistance no tight spots icon_thumright


Tue 26 Jun, 2012 6:00 pm
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TRAIL BOSS
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Joined: Mon 17 Oct, 2011 7:37 pm
Posts: 271
Location: Cooroy
Post Re: Brake pad wear
... Are both pistons supposed to move? dontknow

No pressure on the pad from the top one, bottom has heaps of pressure...
Piston side pad is also more worn on the bottom than the top, would that be from the top piston not putting any pressure on the pad?

What would cause one piston to not move??

Thanks for the replies people, everything I pull apart on the bike is a first for me - never been very mechanically minded, but trying to learn all I can.

Cheers.

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Dave
08 WR 250F


Tue 26 Jun, 2012 6:24 pm
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TRAIL BOSS

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Posts: 280
Post Re: Brake pad wear
ok so get two small g clamps from the hardware store use one to hold the good piston in, then slowly press the front brake untill the other piston moves but not so much that it comes out completely about 5mm will be safe now use g clamp2 to wind piston back in, repeat a few times until it moves free . if you cannot move the piston with the brake lever and g clamp on good piston then it's caliper rebuild time!
good luck :D


Tue 26 Jun, 2012 6:31 pm
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TRAIL BOSS
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Location: Cooroy
Post Re: Brake pad wear
Cheers, will try tomorrow. icon_thumright

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Dave
08 WR 250F


Tue 26 Jun, 2012 6:37 pm
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Post Re: Brake pad wear
When you push the pistons out rub some rubber grease or lanolin grease around the sides of the piston,just a smear mind you.Then push back in.


Tue 26 Jun, 2012 8:36 pm
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Post Re: Brake pad wear
Although Im not the OP, thanks all that have posted, have just learnt a lot as its brake pad time for the WR - any brands of pads better etc?

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Sun 15 Jul, 2012 8:29 pm
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TRAIL BOSS

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Post Re: Brake pad wear
yep buy sintered pads


Sun 15 Jul, 2012 9:51 pm
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Post Re: Brake pad wear
I remember when Shane told me to put air hose on caliper to blow out piston shah it shot out alright.. right into his ankle lol

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Mon 16 Jul, 2012 10:05 am
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