HELP; my rear brake is grabbing.

**kneescraper** · 21st June 2007, 21:26

Hey all,

After a quick clean and rebuild-ish, my rear caliper seems to be grabbing the disc at all times. I did bleed the system with new DOT 4 fluid.

I rode the bike down the road for 5mtrs and the brake disc was so hot you could cook ya dinner on it.

Any suggestions.

**kneescraper** · 22nd June 2007, 10:00

Thought so....

**MSTRS:Me** · 22nd June 2007, 10:01

Originally Posted by kneescraper

Thought so....

What? It's settled down with use?

**imdying** · 22nd June 2007, 10:21

Originally Posted by kneescraper

After a quick clean and rebuild-ish

What does that mean? And what did you clean it with?

**kneescraper** · 22nd June 2007, 10:59

Nar it hasnt settled down.

I cleaned it using CRC 5.56 penertation fluid. I took the caliper apart and clean it as it was guncked up.

**imdying** · 22nd June 2007, 11:01

Oh dear, you've knackered it

I'll find a link for you in a minute

/edit: Linkzorz!
http://www.kiwibiker.co.nz/forums/sh...ad.php?t=52017
http://www.kiwibiker.co.nz/forums/sh...ad.php?t=52180

If you were in Chch, I'd fix it tomorrow for you

/edit2: I'm willing to bet there's people who've read that and thought my figure of over 100 calipers was an idle boast... it ain't

**kneescraper** · 22nd June 2007, 11:07

Oh no!..if you could fix it tomorrow could you inform me out to fix mine..

**imdying** · 22nd June 2007, 11:10

You'll need to pop the piston out, use teh mcyl. Then clean the whole thing in meths, give it a big scrub up. Then clean the piston with some 600+ grit sand paper, just get it all shiney again. Then hot soapy water the whole lot. Then whack your new seal in, and you're off. Caliper piston seals are measured by the outside diameter of the piston, shouldn't be too hard to get a seal locally (Apex in Hamilton at a pinch). You might have to do without the dust seal (no real biggy if you clean your caliper with hot soapy water every 3-4000kms), as that'll most likely be an OEM part. Reassemble with RUBBER grease or brakefluid, bleed, and you're done

**The Stranger:Me** · 22nd June 2007, 11:23

After changing the rear wheel bearings on my GSXR I had a similar problem. I hadn't done anything to the caliper other than remove it a re-install it.
I reasoned it must be sitting a little askew, so tried standing quite frimly on the brake lever, that didn't work so I whacked it a couple of times with a large rubber mallot. After that, no problems.

**kneescraper** · 22nd June 2007, 11:23

So no WOF for me tomorrow. Dam!...fuck I can be a dork sometimes. Thanks for the help

**kneescraper** · 22nd June 2007, 11:29

Originally Posted by The Stranger

After changing the rear wheel bearings on my GSXR I had a similar problem. I hadn't done anything to the caliper other than remove it a re-install it.
I reasoned it must be sitting a little askew, so tried standing quite frimly on the brake lever, that didn't work so I whacked it a couple of times with a large rubber mallot. After that, no problems.

Thanks for that, I thought the same thing but no amount of wacking helped. I think imdying is onto it....makes perfect sense to me.

**imdying** · 22nd June 2007, 11:30

If you've all the parts, and some fresh fluid, you could do it in an hour, still time for a warrant

**imdying** · 22nd June 2007, 11:32

Originally Posted by The Stranger

I reasoned it must be sitting a little askew, so tried standing quite frimly on the brake lever, that didn't work so I whacked it a couple of times with a large rubber mallot. After that, no problems.

You worry me

Give it a good inspection, given that all the parts a good snug fit, that should be a pretty difficult thing to replicate. Just make sure you caliper bolts etc are tight, and that you've got the spacer between the caliper carrier and the wheel/swingarm still there

**The Stranger:Me** · 22nd June 2007, 11:47

Originally Posted by imdying

You worry me

Aww nice of you to care.

On the GSXR 1000 the caliper is not directly fixed to the swing arm. It has a separate floating carrier. A little grit/shit between the carrier and swingarm or had I not seated the carrier correctly would be enough cant the carrier out of alignment.