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Couple Q's about CBR 1000 forks

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Old May 5, 2011 | 11:08 AM
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Couple Q's about CBR 1000 forks

I have a leaky seal on one of my '04 forks. First question is which way does the seal face. The current one has the spring side facing down (when fork is one the bike).

The second question is what am I missing when I try to loosen the socket bolt from the bottom of the fork to remove the damper. What is happening is the damper is spinning with the bolt. Holding the damper rod at the top doesn't help because it rotates also. There are two holes in the fork tube. Should something go in there to keep the damper from rotating while I loosen the socket bolt? Didn't want to jam a screwdriver in there haphazardly.

Slightly off topic. I made a tool to help remove the fork bolt and lock nut. Seems like this procedure needs 3 hands. I alas, only have two. It is a foot lever that goes into the two holes in the plastic spacer. Using my foot, I can compress the spring to get a wrench on the fork damper while pulling up on the fork bolt. Using two wrenches on the top to loosen the locknut had me stripping the aluminum threads.


Attached Thumbnails Couple Q's about CBR 1000 forks-seal.jpg   Couple Q's about CBR 1000 forks-fork-helper.jpg   Couple Q's about CBR 1000 forks-closeup-helper.jpg  
Old May 5, 2011 | 11:58 AM
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Originally Posted by Gregw
The second question is what am I missing when I try to loosen the socket bolt from the bottom of the fork to remove the damper. What is happening is the damper is spinning with the bolt. Holding the damper rod at the top doesn't help because it rotates also. There are two holes in the fork tube. Should something go in there to keep the damper from rotating while I loosen the socket bolt? Didn't want to jam a screwdriver in there haphazardly.

Screw the cap back on the fork and the spring tension should hold it in place while you break the bolt loose.
Old May 5, 2011 | 12:20 PM
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Thanks, I'll give that a shot.
Old May 5, 2011 | 12:45 PM
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No joy. Even compressing the fork with a ratchet strap, the bolt still spins.
Old May 5, 2011 | 12:48 PM
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Have you tried an impact gun?
Old May 5, 2011 | 01:30 PM
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Yeah, I have a cordless dawalt impact. Unfortunately there isn't enough resistance from the bolt to engage the impact, it just spins freely
Old May 7, 2011 | 06:57 AM
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At this point I just drill out the bolt. It might be possible to remove what you have, but since time is money it's cheaper to just install a new bolt.

On a side note: you should leave the entire cartridge together until it's out of the fork. It's actually easier. It needs to be that way for reassembly anyway.
Old May 7, 2011 | 07:50 AM
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I was thinking that would be my next step. Haven't been able to get to it yet, had a computer crash I had to take care of. I hate Norton (not the bike). I dumped their software years ago, but there was over 100 entries in the registry I tried to remove. That didn't work out so well.
Old May 7, 2011 | 07:53 AM
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Anyone have an answer on the seal? I thought I had it in correctly, but the thing started leaking after just a couple hundred miles.
Thanks.
Old May 7, 2011 | 10:57 AM
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Your seal is oriented correctly in the picture, I had a similar problem w/ Race Tech seals went back to honda parts w/ no issues. I also have had problems getting the cartridge bolt out, Once I drilled it out and on the other fork I made a cartridge holding tool out of some pipe and notched it to fit in the top of the cartridge. Race Tech and Motion Pro offer them, not terribly difficult to make you own.
Old May 7, 2011 | 11:48 AM
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The seal will notoriously leak regardless of manufacturer if there is a some crud caught in it... A thin, not sharp plastic sheet is a perfect cleaner... A lot of the times that fixes the leak...
Old May 7, 2011 | 12:26 PM
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Re-tighten the bolt and use an impact to loosen. Try it over and over again and it should release. I had the same problem doing my 954.
Old May 7, 2011 | 02:52 PM
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Originally Posted by Tweety
A thin, not sharp plastic sheet is a perfect cleaner... A lot of the times that fixes the leak...
I've tried that trick a couple times, but the leak would come back. So bad recently it left a small puddle on the garage floor.
Old May 7, 2011 | 02:53 PM
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Originally Posted by grnell
Your seal is oriented correctly in the picture, I had a similar problem w/ Race Tech seals went back to honda parts w/ no issues.
Thanks for the clarification. These were Honda seals BTW.
Old May 7, 2011 | 02:54 PM
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Originally Posted by D VTR RIDER
Re-tighten the bolt and use an impact to loosen. Try it over and over again and it should release.
Thanks, I'll give that a whirl before drilling.
Old May 8, 2011 | 05:47 AM
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Originally Posted by grnell
I had a similar problem w/ Race Tech seals went back to honda parts w/ no issues..
That's funny, because RT seals are Honda parts!
Old May 10, 2011 | 10:44 PM
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I tried to tighten the bolt back up but it just wasn't happening. I even put the spring and fork bolt on, then compressed the fork with a ratchet strap. A check with a drill bit showed that the bolt would just spin also. Finally took the fork to the Honda dealer and they had the tool grnell spoke of. Just a couple minutes and the job was done. They didn't even charge me.
Thanks everyone for the tips.
Old May 11, 2011 | 06:22 AM
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Did you ever get the leak figured out? I'm curious if it was just a bad seal or if something else was going on.
Old May 11, 2011 | 09:04 AM
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I'm going to put it back together today hopefully. I found a small rust pit right where the seal normally rides, so I'll try to smooth that down first. I checked the tube for straightness and it is almost perfect. Only time will tell I think.
Old May 11, 2011 | 09:45 AM
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Thanks. I've been thinking about digging into my forks this fall, but I'm a little scared to do it myself. These pics and thread help.
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