Seem to have a little problem. Front brakes? - TwoWheelForum: Motorcycle and Sportbike forums
 
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post #1 of 13 (permalink) Old 06-11-2007, 04:36 PM Thread Starter
 
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Seem to have a little problem. Front brakes?

For the first time since I have owned the bike I finally got the front end off the ground in the garage to do an inspection ( need to get a front Pit Bull stand) I thought I would see how things were mechanically. As I spin the tire the brakes seem to be engaged they are draging, I spin the tire and I may get another 1/4 turn just as I let go. It's a 98 ZX9R with stock calipers Tokico 6 pots with HH Sinterdes. Where do I start correct this? I'm about to pull the pads out and see how it spins. I'll check back soon.


Thanks
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post #2 of 13 (permalink) Old 06-11-2007, 04:41 PM
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They do drag a bit... but the wheel not spinning maybe be dry bearings over brake pad drag... Remove the brake calipers and try to spin it again.




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post #3 of 13 (permalink) Old 06-11-2007, 04:43 PM Thread Starter
 
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OK I pulled the Right side out ( started button ) and that seemed to free things up. Now what, I'm sure I have to tare it down but before I do I want to know what to look for. I know on car brakes you want to add a little grease to the slide area for things to move. I have had the apart before so that won't be a problem.
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post #4 of 13 (permalink) Old 06-11-2007, 04:48 PM
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Yeah I would try to grease the slides first... before you get into other things...




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post #5 of 13 (permalink) Old 06-11-2007, 05:18 PM Thread Starter
 
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Gas Man How did I know you would be the first one to help me with this problem? I don't post that often but when I do your their

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post #6 of 13 (permalink) Old 06-11-2007, 08:07 PM
 
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before you grease the parts though, you would be wise to clean them well, and inspect for the cause of your problem. you MAY need to rebuild the calipers, or just do a good thorough cleaning and lubricate what needs to move freely.
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post #7 of 13 (permalink) Old 06-11-2007, 08:15 PM
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Gas Man How did I know you would be the first one to help me with this problem? I don't post that often but when I do your their

b/c hes got a laptop on his choppa so he can post at stoplites! he may even have a sandwich maker and blender under the seat!

01 CBR929RE ------------- 01 DRZ400S SOLD ------------ 95 CBR900RR

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post #8 of 13 (permalink) Old 06-11-2007, 08:52 PM
 
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The pad pins that the pads slide on could be corroded or have worn spots. Or the pads could have corroded edges. The piston(s) in the caliper could be corroded and the seal could be worn. The square edge of the piston seal helps pull the piston back. The pads and pins can be easily checked. The caliper will have to be overhauled to check the piston and seal. If there's light corrosion on the piston, it may clean up with emery cloth. If you do one caliper, do both.
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post #9 of 13 (permalink) Old 06-12-2007, 03:50 PM Thread Starter
 
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Cool guys Thanks a bunch for the help.
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post #10 of 13 (permalink) Old 06-12-2007, 03:50 PM
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Yeah a caliper rebuild was the next thing I was thinking...

I do try wing.. I do try..




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post #11 of 13 (permalink) Old 06-12-2007, 07:29 PM
 
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ABSOLUTELY clean the calipers anyway. It's easy and should be done often.


Lil help fo yo:

http://www.trackdaymag.com/i?a=37



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post #12 of 13 (permalink) Old 06-12-2007, 10:50 PM
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ABSOLUTELY clean the calipers anyway. It's easy and should be done often.


Lil help fo yo:

http://www.trackdaymag.com/i?a=37
Excellent! Well except for the part that says to use some puzzy biodegradable cleaner... I WANT CHEMICALS!!!
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post #13 of 13 (permalink) Old 06-13-2007, 11:47 AM Thread Starter
 
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Took the caliper apart last night to see if anything stood out, it was clean as a bell inside and out. I even went as far as to take out all the pistons for further inspection, they all looked good. I did notice the pistons didn't move very freely when I put them back in their holes. Is it possible that the seals have expanded so much from the brake fluid that thay are puting things in a bind? I removed one seal ( upper ) and the thing was nearly 1/4 the size larger I hardly got it back in. I need to get new seals and go from their. After I tore it down I didn't have a chance to get it off the ground for a free spin maybe I fixed it who knows.
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