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Burned, but not too bad. Vintage chrome MTB woes.

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Burned, but not too bad. Vintage chrome MTB woes.

Old 08-30-15, 02:22 PM
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Bikedued
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Burned, but not too bad. Vintage chrome MTB woes.

Last Sunday I went and bought a used chrome mountain bike. The seller thought or somehow knew it was a Jamis, though it has no markings. So I did the deal, and I could tell it needed work. I was correct. EVERYthing was loose or installed incorrectly, but that's to be expected on an older bike I guess.

Well, I took it on it's first ride longer than a lap around the back yard today. About halfway through the ride I began to notice something wasn't quite right. You know the little tabs you catch the sole of your shoe on, to flip your toes into the toe straps (if so equipped?) Well, during the ride I noticed they were on the front of the pedals, . Oh geez, guess I get to go home now and throw away an otherwise okay set of Shimano cranks.. I finished the ride and started the disassembly. I decided to to try the pedals at least. I slipped a length of pipe over a 15mm, and tried to undo the pedal. I put enough force on it, that the wrench slipped off the flats, and shot 5-10 feet out of the end of the cheater pipe. So much for that idea.

I decided to just pull the cranks and trash them...

I loosened the spindle nuts, which were barely tightened at all, and the arms popped off the spindles with no effort at all. I then found the bearings were blown out, and the threads on the end of the spindle were half gone from previous galling.

I dug out a Shimano crank I got in a deal yesterday, and swapped on the biopace chainrings from the damaged cranks. If my luck runs like the rest of this project, the BB cups will be frozen in the frame. About to go out and try to tackle that.

I guess I should look bikes over more carefully, but it's not so bad when you have bins upon bins of spare parts.,,,,BD

These are the dead cranks. If I can dig up a cartridge BB, I will post a pic of the transplants.

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Old 08-30-15, 02:27 PM
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The portage strap I made from an old thick leather belt I had laying around. It worked out quite well.,,,,BD
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Old 08-30-15, 03:06 PM
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How is the portage strap attached? Are there braze ons for it?
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Old 08-30-15, 03:43 PM
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I had a Jamis that had had the same portage strap set-up. I think you may have a Jamis. I never checked the serial number history - the bike was too small and I passed it on.
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Old 08-30-15, 03:51 PM
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Yep, it had the braze ons. It was funny how many bikes had them, and showed the strap in the catalog picture, but I have yet to find a bike with mounts and an intact strap.

As far as Jamis goes, even finding a picture of a bike made before the 2000's is next to impossible. Much less serial number info on them.

And now, I feel like a big dummy. Someone swapped the pedal cages!!!! I picked up the left crank arm, and the pedal had a big L on the end of the shaft? The one pedal I tried removing, I turned opposite of normal, because I believed it to be installed on the wrong side. Oh well, at least I found the bad bearings, less than robust crank arm installation, and galled spindle threads. I don't feel too embarrassed, and the bike will be better off in the long run.,,,,BD

Apparently you can't type g o o b e r on here? That's a little ridiculous if you ask me?? I had to change it to dummy, which is allowed....
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Old 08-30-15, 04:41 PM
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No reason to expect steel cups to be impossibly stuck in a steel frame, I've yet to come across that.

The threaded-type spindle is a cheapie for sure, definitely not Shimano, so good riddance. Cartridge bb's are cheap, and this is the opportunity to correct the excessive "chainline" dimension of most stock setups. You don't want a bike that derails the chain off the big ring when you roll it backward after all.

I do a tear-down when I encounter a bike that has obviously been monkeyed with. I refuse to ride or sell bikes that show convincing signs of having been reassembled during a meth addict's 3AM-7AM spare time. Yes, I have seen this more than once.

Maybe you'll luck out and the wheels will have been left unfettered.

The chrome looks great so it should be a worthwhile build!

And good luck in search of the perfect opportunity to use that portage strap!

Last edited by dddd; 08-30-15 at 04:45 PM.
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Old 08-30-15, 06:26 PM
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I feel your pain, OP. I recently picked up a '91 Trek 930 for my wife. Didnt bother to check it out very thoroughly before I bought it as it was very clean. Got it home, put it on my stand and realized it's gonna take a ton of work to get it riding well. Let's see.. right thumbshifter is pretty much shot, left pedal has a bent spindle, it oddly has a seat post that's too narrow for the frame, front tire has a slow leak, and brakes, headset, and derailleurs are all completely out of adjustment. Oh and the stem will definitely have to be replaced as it's too long for her reach.

I didnt pay a lot for the bike, but would've offered a lot less had I known about all this, lol. I'll do the work, and it'll be a nice bike in the end, but I definitely could've approached this project better..
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Old 08-30-15, 06:48 PM
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FWIW that looks a lot like a Ross Mt Hood or Whitney from '85-ish. The bottle mounts, seat post QR location and rear wheel to seat tube gap are very similar:

[IMG]P1030787 by Mark, on Flickr[/IMG]

Either way, that's going to be a great rig once you've gotten it sorted!
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Old 08-30-15, 07:05 PM
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The bottle mounts are similar, but I couldn't find a single picture of a chrome Ross that had anything other than three pass through housing guides. Mine has the slightly more modern looking cable stops and bare cable.,,,BD


It already rides really nice. Cartridge bottom bracket and some platform pedals, and it will be most of the way to where I want it. And of course order more clear cable housing. I have some on the front shifter, but I don't have but two feet left.
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Old 08-30-15, 07:29 PM
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Add something to the pile, Univegas had the portage strap on some of the models, Alpina pro for one but that was smokey chrome.

Handy thing to have, used my strap several times during ride events.
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Old 08-30-15, 07:37 PM
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I've run into varying levels of stuck cups in steel frames. The absolute worst was an 88 Schwinn Circuit. I had to cut the fixed cup into 4 pie wedges before it finally gave up and let go.,,,,BD


There is a ghost of an upper seat tube decal. Did Jamis have those? I've never seen an early Jamis mtb, or even a picture of one.
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Old 08-30-15, 08:09 PM
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This is what the decal ghost resembles, but mine isn't fillet brazed nor is it equipped with roller cams. The placement of the decal, and the shapes in the leftover image looks like this upper seat tube decal. The braze on placement seems to match somewhat?,,,,BD

http://imgs.inkfrog.com/pix/bbcbikes...akota_(16).JPG
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Old 08-31-15, 01:42 AM
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Is that a Top Gun decal on the fork? The only Top Gun I remember reading about was the Klein bike that they ended up having to change the model name because of a trademark dispute over the movie. As if anyone was going to think a Klein Top Gun mountain bike was an attempt to cash in on a stupid Jerry Bruckheimer movie. That being said I love Top Gun, and other equally bad 80s era movies.
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Old 08-31-15, 04:43 AM
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They still make the brand, from what I found out, but could barely find any info about their older offerings. This one is close to NOS condition, and the elastomers function perfectly. It's a nice fork IMHO.,,,,BD
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Old 08-31-15, 07:32 AM
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Originally Posted by Bikedued View Post
Apparently you can't type g o o b e r on here? That's a little ridiculous if you ask me?? I had to change it to dummy, which is allowed....
They did that, because otherwise the ghost of Redd Foxx wouldn't be able to post here anymore.

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