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RIP Miyata 1400

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Old 07-11-18, 11:44 AM
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squirtdad
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RIP Miyata 1400

Miyata's with internal Cable routing have a reputation for cracks forming at the routing hole.
I had thought I had escaped that problem, with a bike that I bought new and has been stored inside and well kept

That is not the case, as can be seen from the pic.

I have asked frame builders forum for input, but other than top tube replacement am assuming the frame is toast...and no matter what it still would not really be the same

So I will be watching for sale for 58cm frames, But if anyone has anything in that area, PM me I will also ping people who I recall had interesting frames at one point

RIP 89 Miyata 1400


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Old 07-11-18, 12:27 PM
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My condolences.
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Old 07-11-18, 01:14 PM
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Sad...time to get a New BIKE.
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Old 07-11-18, 01:27 PM
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Can't figure out why the frame designers back then thought it would be OK to punch such a large hole on the thin walled areas of the TT, without adding any reinforcement to the cut edge.....
If that happened today, it would certainly be a basis for a mass product safety recall...
Sad thing is, I think this design was really a cost saving approach on how to provide internal cable routing at the TT....
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Old 07-11-18, 01:43 PM
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I sold my 1400 a few years ago, timing seemed right. Very sorry for your loss, but the good news is you can pick-up a Miyata or Koga frame on ebay and do an easy swap! The Miyata-Koga frames can be a great value, love my Gentsracer.
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Old 07-11-18, 01:45 PM
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Probably not a safety recall if it doesn't cause crashes and injuries, but might get warranty replacement.

Do you have a better photo of where it occurred on the frame? There are probably a few repair options.
  • Tig welding. Cheap and quick. Probably OK for Chromoly, but not optimal for Reynolds 531 and other older alloys. Still, it would make a quick and dirty repair to get you back on the road.
  • Cutting tubing in half and brazing on external gussets. Not pretty, but it would be functional. You could probably shape your gussets like lugs, and they may blend in.
  • Either redrill your cable routing holes after the repair, or find some vintage straps for externally routed cables.
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Old 07-11-18, 02:11 PM
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How I fixed mine:



Fairly easy fix. My '87 512 had 3 cracks in the rear cable routing opening. The tube was almost broken in half.

Anyway, what I did was find a donor frame, and cut a 6" section of steel tubing out. Then cut the section of tubing lengthwise into two halves. Drilled a hole for the cable routing. Placed two sections over the crack in the frame.

Bought a $50 MAPP gas torch, silver brazing rod and flux. Brazed the two halves over the cracked section of tubing. Touched up with rattlecan. Frame fixed for under $100.





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Old 07-11-18, 02:18 PM
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Oh man, I am sure that is heartbreaking.
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Old 07-11-18, 02:35 PM
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@Colnago Mixte, that there is a fix approved by Red Green and the majority of the possum Lodge! "If the women don't find ya handsome, they should at least find you handy."

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Old 07-11-18, 02:47 PM
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Originally Posted by Chombi1 View Post
Can't figure out why the frame designers back then thought it would be OK to punch such a large hole on the thin walled areas of the TT, without adding any reinforcement to the cut edge.
I agree, terriby shortsighted design. Personally I've always disliked internally routed cable frames, they just seem like a bad idea on multiple levels to me.
That's a drag about the frame failing though. Shows you those frames must've been destined to fail if someone who takes care of their bikes buys one new, and it ends up like this.
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Old 07-11-18, 03:05 PM
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Originally Posted by exmechanic89 View Post
Shows you those frames must've been destined to fail if someone who takes care of their bikes buys one new, and it ends up like this.
It is only 30 years old.

It wouldn't hurt to check the warranty coverage as the company more or less still exists.

I bet a bunch of companies would be happy if their products wear out after 30 years, and the person is forced to buy new.
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Old 07-11-18, 03:30 PM
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Originally Posted by CliffordK View Post
It is only 30 years old..
Yeah in the life of a well made steel frame, not a lot.

I didnt know Miyata still existed, interesting.
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Old 07-11-18, 03:34 PM
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Originally Posted by exmechanic89 View Post
Yeah in the life of a well made steel frame, not a lot.

I didnt know Miyata still existed, interesting.
Apparently the modern ones are all Koga-Miyata, but not big in the USA. Nonetheless, still available elsewhere.
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Old 07-11-18, 03:51 PM
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Originally Posted by CliffordK View Post
Apparently the modern ones are all Koga-Miyata, but not big in the USA. Nonetheless, still available elsewhere.
I thought Miyata stopped building the Koga frames almost 20 years ago..? I guess there wouldnt be much point in their name being on the new frames then, though.
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Old 07-11-18, 04:48 PM
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I checked with my favorite LBS, which also builds frames.....and confirmed the cost to fix it right would be more than finding a replacement frame. @Colnago Mixte pretty creative fix, but this is my "good, best bike" so I am going for a smoother look than your repair

Interestingly they had a a miyata 512 bike and it had good reinforcement for the top tube cable holes. It was really clean and a good price, but I am thinking I will hold out for a higher end frame....
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Old 07-11-18, 05:04 PM
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My wife’s custom Erickson developed a similar crack after about 18 years of many lovely miles, but it had additional heating to braze on the decorative snowflakes. The crack visible under the big TT snowflake continues around past the internal routing hole and its reinforcement out of sight in this photo to the opposite tip of this snowflake..

Cant wait to hear what you eventually select as the 1400’s “replacement”.

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Old 07-11-18, 06:13 PM
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Originally Posted by squirtdad View Post
I checked with my favorite LBS, which also builds frames.....and confirmed the cost to fix it right would be more than finding a replacement frame. @Colnago Mixte pretty creative fix, but this is my "good, best bike" so I am going for a smoother look than your repair

Interestingly they had a a miyata 512 bike and it had good reinforcement for the top tube cable holes. It was really clean and a good price, but I am thinking I will hold out for a higher end frame....
I would think it might be worth repairing cheaply for a single speed conversion. I have a Miyata-built Univega in 58 cm that I ride SS with wider tires for dirt roads and it's great.

You're not gonna just throw that frame away, are you? At very least, cut it in half for use as a sample of what splined triple butted tubing looks like from the inside. As far as replacement goes, fortunately Miyatas are not rare, I have seen a few Triple Crosses that really tempted me. I like the range of tire sizes you can use on those.

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Old 07-11-18, 07:23 PM
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I've got the same '89 miyata 1400 in a 60cm frame that hasn't seen any damage yet. Anything I can do or have done to reinforce the frame and prevent a frame crack at the cable drilling ?
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Old 07-11-18, 07:41 PM
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Originally Posted by KLOSHE View Post
I've got the same '89 miyata 1400 in a 60cm frame that hasn't seen any damage yet. Anything I can do or have done to reinforce the frame and prevent a frame crack at the cable drilling ?
Check for any sharp edges at the openings on the TT......
I suspect the cracking start at stress rises caused by any unevenness or sharpness at those areas. Not sure if easing out such with maybe a jeweler's fine file could help, but maybe, if done right it could not harm it either....
The largish frame size might help disperse the stresses on the frame too, so maybe that's why your haven't cracked....yet?...
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Old 07-11-18, 07:46 PM
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This is yet another reason to detest internal cable routing, which has no benefits and lots of drawbacks. Really stupid engineering.
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Old 07-11-18, 09:15 PM
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Originally Posted by John E View Post
This is yet another reason to detest internal cable routing, which has no benefits and lots of drawbacks. Really stupid engineering.
Internal cable routing works, as long as it is done right by the bike manufacturer and handled by the owner correctly.......
Whether it really gives enough aero difference on a frame is very debatable, but some really like the cleaner looks it gives the frame....
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Old 07-11-18, 09:27 PM
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Originally Posted by Chombi1 View Post
Can't figure out why the frame designers back then thought it would be OK to punch such a large hole on the thin walled areas of the TT, without adding any reinforcement to the cut edge......
It's lasted nearly 30 years. No ones ever even hinted that any bike I've ever bought would last that long. Although... still very sad. But I wouldn't discredit the designers or engineers or whoever decided to poke those holes. Godo idea or NOT... it did get the job done.
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Old 07-11-18, 10:39 PM
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Somewhere back in the C&V archives there is mention of an office in the US (or maybe it was Canada?) still handling Miyata warranty issues up to ten or so years ago. I think it was an import/export firm or something, and they might have been doing so as a courtesy to Miyata, which had stopped selling bikes to the US in 1993 or so.
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Old 07-11-18, 11:49 PM
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Originally Posted by KLOSHE View Post
I've got the same '89 miyata 1400 in a 60cm frame that hasn't seen any damage yet. Anything I can do or have done to reinforce the frame and prevent a frame crack at the cable drilling ?
You could probably add something like this coverplate.

INTERNAL BRAKE GUIDE COVERPLATE :: SMALL PARTS :: BRAZON/SMALL PARTS :: Nova Cycles Supply Inc.



I'd probably choose something a little larger, perhaps a custom formed one.

But, then you're into at least locally stripping the frame, brazing, and repainting.
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Old 07-11-18, 11:52 PM
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I had that problem, too, but I didn’t find out untilI sanded some paint away. I was bummed!



I found a local builder who brazed a couple collars and cable guides on the top tube for $55. Worked out OK.


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