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Old 12-31-2009, 09:52 PM   #1
Menasco Pirate OP
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Pitted Fork Tube Repair?

I just started the minor restoration of a bike. Problem is the fork tubes are pitted. The bike is too old and rare for replacement parts. These tubes are a bit odd too in that the OD is reduced between the triple clamps.

I'm looking for someone in the LA area (prefered) to grind off the chrome and rust pits, rechrome and then regrind. I'm very surprized not to see any thread on this subject and figured this was a good place to start.

I have found a couple of internet hits in England which offer these services but was looking for something a little closer to home. Anybody have experience here?

I've contacted Franks here in the US to see if they can help, but it is the New Years weekend.

I would like to reuse the factory fork tubes if possible however.

Happy New Year

Steve
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Old 12-31-2009, 10:08 PM   #2
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Franks should be able to hook you up...Is it a Triumph by chance...My buddy's Daytona had tubes that were stepped and Franks replaced them without a problem...
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Old 12-31-2009, 10:54 PM   #3
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Thanks, the bike is a HRC RTL250 trials bike. Looking for options right now. The factory forks have a large transition radius in the neck down area. Was not sure if they would replicate that or not.

Frank's does have a great following.

Happy New Year

Steve

Quote:
Originally Posted by eric123
Franks should be able to hook you up...Is it a Triumph by chance...My buddy's Daytona had tubes that were stepped and Franks replaced them without a problem...
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Old 01-01-2010, 12:16 AM   #4
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I checked with a place here in Portland OR that replates hydraulic cylinders about re-doing the tubes for an 84 R100. It wasn't going to be a problem, but they were going to have to send them to their Seattle facility to have it done. They no longer did that here in town. The price was something like $200 for the set.

I've also heard of something like nitrite or nitrate coating of parts by some place in Florida. I'll look around for the place - it used to be in my favorites, but got lost in a hard drive crash. These places will grind off the current surface and replate to the original dimensions, but I don't know about a stepped surface.
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Old 01-01-2010, 06:58 AM   #5
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Quote:
Originally Posted by Menasco Pirate
I just started the minor restoration of a bike. Problem is the fork tubes are pitted. The bike is too old and rare for replacement parts. These tubes are a bit odd too in that the OD is reduced between the triple clamps.

I'm looking for someone in the LA area (prefered) to grind off the chrome and rust pits, rechrome and then regrind. I'm very surprized not to see any thread on this subject and figured this was a good place to start.

I have found a couple of internet hits in England which offer these services but was looking for something a little closer to home. Anybody have experience here?

I've contacted Franks here in the US to see if they can help, but it is the New Years weekend.

I would like to reuse the factory fork tubes if possible however.

Happy New Year

Steve
I agree, go to a hydraulic cylinder repair company. I used to work at one doing the repair drawings for the pistons/etc. All should have the capability to do the proper grinding on the tubes and many will have the facilities to strip/rechrome on site. If not, they will have a place to send them. If you know anyone who works with heavy equipment they should be able to guide you to a source. After all, these companies are the pros. We did a lot of steel mill cylinders as well as some telescoping cylinders, which were really tough because the pistons were integral parts of the tubes.

That bike sure isn't some clapped out CL350... it's well worth doing the original tubes. Does it have some competition history?
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Old 01-01-2010, 07:02 AM   #6
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I replied

to your other thread... http://www.ecgrinding.com/
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Old 01-01-2010, 08:31 AM   #7
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poor pitted me

Thanks for the help and ideas.

I'll post what I get back from these contacts

Steve
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Old 01-01-2010, 08:40 AM   #8
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Ask them about the high tech coatings as well.

Has it been chilly on Angeles Crest these days? I sure have fond memories of my time in Glendale and Tujunga riding in the canyons on a week day with no traffic.
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Old 01-01-2010, 09:58 AM   #9
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If the bike is not going to be ridden much.... you could go with a chrome powder coat. Not quite as shiny as real chrome but it would do if you are not going concours.
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Old 01-01-2010, 07:16 PM   #10
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I haven't been up there since they reopened after the fires, then closed it after the rain and then opened it again. I've been away on travel so much but tomorrow I will give it a go.

Steve

Quote:
Originally Posted by Wirespokes
Ask them about the high tech coatings as well.

Has it been chilly on Angeles Crest these days? I sure have fond memories of my time in Glendale and Tujunga riding in the canyons on a week day with no traffic.
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Old 01-02-2010, 10:30 PM   #11
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Drove the Crest today on my way back from down below (with the RTL) for the first time since the fires. In some places it is as stark as the moon. The road itself looked pretty good, hopefully Sunday we will test it on a bike.



Quote:
Originally Posted by Wirespokes
Ask them about the high tech coatings as well.

Has it been chilly on Angeles Crest these days? I sure have fond memories of my time in Glendale and Tujunga riding in the canyons on a week day with no traffic.
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Menasco Pirate screwed with this post 01-02-2010 at 10:36 PM
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Old 01-04-2010, 08:48 PM   #12
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This tubes are the pits

I heard back from Forking by Frank. The say they have them in stock! I questioned that since only 18 of these are rumored to be in the US. They are quoting about $275 shipped. My opinion is this price is excellent.

Maybe they confised the RTL for a TRL so I asked them to verify. I do not know if they are the same length. F by F also does not neck the tubes down between the tripple clamps. After they confirm the model and verfy the length, I'll also ask about doing something special in the neck down area.

I have 2 responces from England. They quote about 125 pounds to rework the old tubes but it may cost about a $100 each way for shipping, potential for issue with Customs etc. Also they are asking about 25 pounds to straighten if they need it.

I have also heard back from a LA area cylinder shop. They are quoting about $300 and 3 weeks turnaround. I got another LA area name tonight and emailed them. My information source says they will also charge about $300.

I also contacted a shop in Florida. They wanted a picture of the pitting before quoting which is kind of hard to shoot. Off to try again!


Thoughts to date:

Forking by Frank is a great resource!

The English really know how to convince you they know what they are doing. They have a lot of experience and knowledge. I would gladly drop them off if I lived there or was visiting for a week. I would like to reuse the OEM tubes

So we will see about the next two quotes.

Steve
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Old 01-05-2010, 05:40 AM   #13
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Xcuvator has used Forking by Frank for several of his BMW restorations and isn't real happy with them. He's had problems with stiction and says they're not smooth on the inside, so have taken quite a bit of work to fix. I seem to recall they weren't perfectly straight either. You'll have to check with him for the details, though.
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