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Fork has a nick in it.

Discussion in 'Technical and Troubleshooting Torque' at netrider.net.au started by Chef, Jan 5, 2009.

  1. Hey folks, something i was asked the other day that i don't know the answer of so I'll run by you.
    One of the forks on a bike has a tiny nick in it that's visible to the eye and obvious to the touch, the seal appears to have been damaged by it and is now leaking.
    The seal will need to be replaced shortly so the forks are coming out, what is the best way to repair the nick?
    Can we do it ourselves with wet and dry? Or does the fork need to be pulled apart and polished by a pro?

    Any help appreciated, cheers.
  2. I haven't done it myself, so i don't know, but if its feel-able I'd have been looking to have it filled and polished out by a pro...
  3. Having grown up with rusty forks and no money, I can attest to the fact that pits and nicks in forks can successfully be filled with Araldite and polished smooth with fine wet and dry.

    Cost is negligible and your fork leg is buggered anyway so what's to lose?
  4. if you take just the inner tube in most places will be able to clean them for min. $$$ :) redline (in dandy did mine), also a bike crash repair place, buffed and cleaned the r6 inner when i had it straighten
  5. I have the same problem as "Chef" pointed out. When you say take it to a pro to polish it, who is the pro? I live in Newcastle, so when I look it up in the yellow pages, who am I looking for?
  6. i use a local bike shop (i would assume most bike shops that do fork seals) would clean & polish inner tubes before rebuilding forks, i just toke the inner sleeve in though. The other guy is a bike smasher repairer (and fork straighten) reckon best to just call around some bike shops/bike smash repairers
  7. Thanks guys for the replies. The pros i was talking about are Promecha who are specialists in suspension.
  8. Good to know it can be done, thanks for the info. I figured the burr could be sanded smooth with a super fine w/d paper and patience. although it never occurred to me to fill the pitt mark in to make the surface smooth.
    It makes sense though, otherwise a spot would be left that could harbour some grit, which would make the exercise a waste of time.
  9. Tell NICK to FORK off!

    If the forks are coming out you can have the legs machined (to get rid of the nick) and resurfaced again (returns surface to original dimensions) which basically reconditions them. It's a relatively cheap way to fix the problem.

    Promecha offers this service. They're out on Westall rd in Springvale. Most likely there are other motorcycle suspension specialists who offer the same service so you could try around.

    If the nick is too deep then they won't be able to do it anyway which means that sanding away the nick may not be such a great idea because that process might leave quite a large scollop in the surface, which may, or may not, lead to the fork oil weeping past it on occasion.
  10. Thanks Tack. I think talking to promecha is the go. But I'm guessing he may just decide to get another fork tube and be done with it.
    It's a reasonably new bike, and he keeps it pristine.

    When i was asked i became curious about the fix myself, it's always good to add to the knowledge bank.
  11. Chef, the best way to fix this is to get it re-chromed.
  12. Yeah I'm with ya, that would be the best chance of restoring it to original spec. But considering price, time off road, and the chances of finding a place that can chrome stuff properly, I'd be more inclined to replace the part and simplify the process.
    I was assuming that because the nick that will be left behind is half a poofteenth of a micron (or about 1mm or less if you want to be specific) that getting rid of the burr would be all that was needed to get the fix.
    But if it means chroming to get the fix, then because it's easy to replace the part I'd go with that in this instance.
    If it was an old resto job, then re-chrome is the go.
  13. There is a chrome plater, on Whitehorse Rd. Nunawading. They have been there since I was a kid, and they do great work. It is not expensive.
  14. Handy to know. I use to do chrome work when i was a wee lad in a run down little place off Malvern Rd. The top chromer could turn out some beautiful stuff that was rock solid. Thick, even coating that didn't have a flaw in it.
    Some of the stuff I've seen recently makes me shake my head.

    There's also a place on Nth Rd Oakliegh before the overpass, looks like he specializes in resto's. Going by the examples in his window he looks like he knows what he's doing.
  15. Any good bloke will do, I reckon.