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Old 07-13-2017, 02:14 PM   #1
mishima
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Front brake issue

I recently changed my chain, sprockets, and tires. After giving it a test ride, I found that it seemed to be difficult to move the bike in neutral or with the clutch lever engaged. When I got it home, I put it on the center stand. The rear wheel spun freely. But, when I jacked it up a bit to check the front, I found that the front brake was binding it up. I just removed the wheel and checked the caliper. The pins seemed to be sliding well. So, I put it all back together and the brake still seems to be rubbing on the rotor when I spin the wheel. Anyone have any ideas on how I can fix this? Is this normal?
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Old 07-13-2017, 02:24 PM   #2
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Front brake issue

It will do that.

Do this: put it on stands. loosen the front caliper bolts just ever so slightly, spin the wheel and while it's spinning slam the front brake to settle the calipers, tighten them down a bit with the brake held.

Also sorry I didn't get back to you timely on the tires, been a busy few weeks for me.
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Old 07-13-2017, 04:17 PM   #3
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Originally Posted by six2one View Post
It will do that.

Do this: put it on stands. loosen the front caliper bolts just ever so slightly, spin the wheel and while it's spinning slam the front brake to settle the calipers, tighten them down a bit with the brake held.

Also sorry I didn't get back to you timely on the tires, been a busy few weeks for me.
Thanks for the tip.

Unfortunately, I was unable to see if it worked or not. I believe that when I had my tires changed last year in CA, whoever worked on it must have used an impact on the caliper bolts. I started to strip both of the heads and had to use an ez off on them.

I guess I might as well rebuild the caliper while I wait for the new bolts to come in.
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Old 07-13-2017, 04:23 PM   #4
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Originally Posted by mishima View Post
Thanks for the tip.

Unfortunately, I was unable to see if it worked or not. I believe that when I had my tires changed last year in CA, whoever worked on it must have used an impact on the caliper bolts. I started to strip both of the heads and had to use an ez off on them.

I guess I might as well rebuild the caliper while I wait for the new bolts to come in.



The torque specs on the zx12 caliper bolts are:
Front caliper mounting bolts 34 NM (25 ft lbs)
Rear caliper mounting bolts 25 NM (18 ft lbs)


It's like 23ft lbs for the 500...I think most bikes are somewhere around this range. IIRC the rear axle nuts are 90ish on most bikes.


Someone didn't honestly put an impact gun on those did they?
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Old 07-13-2017, 04:46 PM   #5
mishima
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Quote:
Originally Posted by six2one View Post


The torque specs on the zx12 caliper bolts are:
Front caliper mounting bolts 34 NM (25 ft lbs)
Rear caliper mounting bolts 25 NM (18 ft lbs)


It's like 23ft lbs for the 500...I think most bikes are somewhere around this range. IIRC the rear axle nuts are 90ish on most bikes.


Someone didn't honestly put an impact gun on those did they?
It's on the 500. I don't know what they did, but I had a real hard time getting them off even with a breaker bar and the ez off socket. I just rebuilt the caliper before I left for my trip last year, so I know that I didn't over-torque them.

The best part is that I just spent $20 on 2 replacement bolts. I hate ordering from Babbitts. $10 shipping BS on top of overpriced parts. I tried ordering them through Rosenau, but they said that it might be months before they get them if they can get them at all.
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Old 07-14-2017, 05:52 AM   #6
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That's some bullshit. Good luck Mike and thanks for the advice Brad.
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Old 07-14-2017, 06:58 AM   #7
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damn! well come over to the single side swing arm world they go on with an impact come off with an impact. the torq specs are somewhere between a breaker bar and an elephant on the end or 7 carny strong men.
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Old 07-18-2017, 01:24 PM   #8
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Steel bolts plus aluminum fork legs minus anti-seize equals SUCK times FAIL squared.
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Old 07-19-2017, 01:36 PM   #9
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Quote:
Originally Posted by mishima View Post
.....The best part is that I just spent $20 on 2 replacement bolts. I hate ordering from Babbitts. $10 shipping BS on top of overpriced parts. I tried ordering them through Rosenau, but they said that it might be months before they get them if they can get them at all.
No bolts of appropriate size from Home Depot, Lowes, Ace, etc.?
There's also Production Tool, Metrics Unlimited, Suburban Bolt, etc.
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Old 07-19-2017, 02:51 PM   #10
mishima
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No bolts of appropriate size from Home Depot, Lowes, Ace, etc.?
There's also Production Tool, Metrics Unlimited, Suburban Bolt, etc.
I would have tried getting replacements at a hardware store, but the bolts are only partially threaded.
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