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Old Streetfighter Motorcycle Forum Post 08-04-2020, 04:40 AM   #11
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Default Re: CBR900RR, SC28, front shock seal problem

Ach soo... I thought the gash was in the SLIDER and wondered what sort of caveman og has swapped the seals the last time...

https://www.biltema.fi/autonhoito/au...lli-2000019604

I'd thoroughly rinse the area with some high vapor solvent, let it air out then give that stuff a toss, fairly thick mix, some sort of a molf is probly a good idea.

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Old Streetfighter Motorcycle Forum Post 08-04-2020, 08:18 AM   #12
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Default Re: CBR900RR, SC28, front shock seal problem

Trying to use the seals as molds is asking for complications IMO. Just dab some epoxy where needed and dress it back down. Simple is good!
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Old Streetfighter Motorcycle Forum Post 08-04-2020, 12:06 PM   #13
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Default Re: CBR900RR, SC28, front shock seal problem

Quote:
Ach soo... I thought the gash was in the SLIDER and wondered what sort of caveman og has swapped the seals the last time...

https://www.biltema.fi/autonhoito/au...lli-2000019604

I'd thoroughly rinse the area with some high vapor solvent, let it air out then give that stuff a toss, fairly thick mix, some sort of a molf is probly a good idea.
That's a good suggestion, I might try that instead of epoxy. Got all sorts of thinner and acetone cans laying around so cleaning's not a problem.

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Trying to use the seals as molds is asking for complications IMO. Just dab some epoxy where needed and dress it back down. Simple is good!
That might be, but the area of damage is quite large. I guess it depends about how easy it is to make a mold of some sort there.

I took apart the shocks today, but hadn't time to actually do anything to them yet. But now I got a picture:


This is what I'm up against here. Hopefully I'll be able to try the fix at weekend.
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Old Streetfighter Motorcycle Forum Post 08-04-2020, 12:12 PM   #14
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Default Re: CBR900RR, SC28, front shock seal problem

Personally, I would file down any high spots and fill it with epoxy. You could also just install the seal with some Threebond or something, but that's just gonna glue them in and make it even harder to disassemble in the future. A less adhesive sealant like silicone would come apart easier, but I'm not sure it'd trust it.

The repair doesn't have to be machine shop smooth. The seals can accommodate a fair amount. If it were mine, I would use the original formula JB Weld to fix that.
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Old Streetfighter Motorcycle Forum Post 08-07-2020, 03:06 AM   #15
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Default Re: CBR900RR, SC28, front shock seal problem

So, a small update to the situation.


I used Loctite's 5min epoxy, since I had it around. Working time was plenty enough for such a small area.



This is how things look like after one day of glue hardening, and after some sanding with #120. I used a small needle file to level out the surfaces, cleaned with acetone, and then applied the glue with a small wooden stick and good'ol fingers. Turned out making a mold would've made things too complicated / time-consuming / messy.

After 1 day of hardening the glue still had enough tackiness to constantly clog the sand paper I used, so I decided to give it a one more day until I ram the seals in, and because it was getting late. I'm a bit worried that the glue isn't going to fully harden in a while still, and it might shrink a little while doing that, but I'm going to put the seals in regardless. Probably going to use some additional sealant adhesive too for extra insurance, gotta see what the hardware stores around here have.
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Old Streetfighter Motorcycle Forum Post 08-08-2020, 03:42 PM   #16
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Default Re: CBR900RR, SC28, front shock seal problem

All's done now:


I pumped the front end for a good amount of time and there's no leaks. I used Loctite's silicone adhesive to secure the seals in their place - don't remember the exact product, but I think anything similar would've worked as well.


Here's the patient. Still alot of stuff to do, but I'm hoping to get it up and running so that I can get atleast a few kilometers of driving for this season. No plans for any serious modifications, I'm thinking of keeping it as much original as possible.

Thanks to all of you for the suggestions you gave in this topic! As an afterthought I feel stupid even thinking that this kind of an issue could not be solved without buying new shocks.
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