Scored a nice Koga Miyata today!
07-03-23, 04:37 PM
#1
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Scored a nice Koga Miyata today!
Picked up a Koga Miyata Gents Touring bike today, appears to be complete! Any advice on restoring? I haven’t done the plastic fenders or generator before. Bike is clean, but needs overhaul. Thanks for looking & happy 4th all!
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07-03-23, 04:57 PM
#2
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That should clean up beautifully!
I can check if I have some more info in my brochures but that looks like a late 70's or early 80's model. Should make for a nice randonneuring bike.
They should have adapters for those Shimano Deore AX oversized pedal holes. Similar to these ones (eBay)
Don't forget to post it in the Show us your Koga-Miyata thread.
I can check if I have some more info in my brochures but that looks like a late 70's or early 80's model. Should make for a nice randonneuring bike.
They should have adapters for those Shimano Deore AX oversized pedal holes. Similar to these ones (eBay)
Don't forget to post it in the Show us your Koga-Miyata thread.
Last edited by JaccoW; 07-03-23 at 05:01 PM.
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07-03-23, 06:29 PM
#3
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I noticed the pedals are an unusual size. They do not spin freely, so these adapters may be necessary if I can’t remedy. Do they require a special wrench to remove?
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07-03-23, 07:08 PM
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https://www.bikeforums.net/16417927-post6.html - spec sheet on one style (mine don't have the "oil seal" that is part of the pedal
Last edited by SoCaled; 07-03-23 at 07:12 PM. Reason: adding links
07-04-23, 08:57 AM
#7
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Wow, that is going to be a 'high-reward' cleanup right there. I see a lot of dirt and little to no corrosion.
There is one of these locally for sale last time I looked. Gonna have to go look at it again. I had a Miyata 710 back in the day as really, my first vintage road bike. They are fantastically built bikes. Lovely color on that one too. Keep us updated with good before/after pictures!
There is one of these locally for sale last time I looked. Gonna have to go look at it again. I had a Miyata 710 back in the day as really, my first vintage road bike. They are fantastically built bikes. Lovely color on that one too. Keep us updated with good before/after pictures!
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07-04-23, 10:01 AM
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I did a thread on these I will try to dig up, has pics of disassembly, etc. No special tools required. Allen key from crank side removes pedal. Allen key from pedal side is a set screw (does not need to be removed to get pedals off) I have had a hard time getting them setup right. The set screw on the inside of the pedal determines how tight or loose they spin. I can not seem to get mine to be loose enough without allowing grease to escape? I am assuming this is my lack of skill/experience? I have not doubled back to solve this properly, they work great but you can see a little grease seeping out (not Ideal)
https://www.bikeforums.net/16417927-post6.html - spec sheet on one style (mine don't have the "oil seal" that is part of the pedal
https://www.bikeforums.net/16417927-post6.html - spec sheet on one style (mine don't have the "oil seal" that is part of the pedal
“Backside” Allen, I recall 7mm, needs to be held and the locking nut accessible from the “shoe” side must be loosened. The pedals engage the crank arm with the big bore chromed nut/cup as I recall 32mm?
like typical pedals, L & RH threading. I suggest servicing one at a time to not crossover parts. Leaking grease is most often from the seals, they do not age gracefully, sometimes falling out, or breaking apart leaving no witness.
Big problem here will be locating toe clips and related plate and fasteners.
07-04-23, 10:24 AM
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? Double check the diagram with your explanation. To adjust or service the pedals the
“Backside” Allen, I recall 7mm, needs to be held and the locking nut accessible from the “shoe” side must be loosened. The pedals engage the crank arm with the big bore chromed nut/cup as I recall 32mm?
like typical pedals, L & RH threading. I suggest servicing one at a time to not crossover parts. Leaking grease is most often from the seals, they do not age gracefully, sometimes falling out, or breaking apart leaving no witness.
Big problem here will be locating toe clips and related plate and fasteners.
“Backside” Allen, I recall 7mm, needs to be held and the locking nut accessible from the “shoe” side must be loosened. The pedals engage the crank arm with the big bore chromed nut/cup as I recall 32mm?
like typical pedals, L & RH threading. I suggest servicing one at a time to not crossover parts. Leaking grease is most often from the seals, they do not age gracefully, sometimes falling out, or breaking apart leaving no witness.
Big problem here will be locating toe clips and related plate and fasteners.
Mine are slightly different than the diagram, I could not find my posts to reference
I added bold to your quote (based on my experience). Mine don't seem to have any seals? I am missing the toe strap clip on one!Found some posts:https://www.bikeforums.net/classic-v...ately-230.html
#5744, 5747, 5794, 5796, 5799, 5801, 5802
07-04-23, 10:33 AM
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There is a rectifier/LED kit on eBay from England. That light will go from 10-15 lux to about 100 lux. I just put the kit on an old Royce Union light. It’s bright!
Cool find!
Cool find!
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07-04-23, 10:39 AM
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07-04-23, 11:14 AM
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That should clean up beautifully!
I can check if I have some more info in my brochures but that looks like a late 70's or early 80's model. Should make for a nice randonneuring bike.
They should have adapters for those Shimano Deore AX oversized pedal holes. Similar to these ones (eBay)
Don't forget to post it in the Show us your Koga-Miyata thread.
I can check if I have some more info in my brochures but that looks like a late 70's or early 80's model. Should make for a nice randonneuring bike.
They should have adapters for those Shimano Deore AX oversized pedal holes. Similar to these ones (eBay)
Don't forget to post it in the Show us your Koga-Miyata thread.
07-04-23, 11:35 AM
#13
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Congratulations, Koga Miyatas are always interesting! Koga Miyata catalogs can be found at "www.restoration.bike/bike-catalogs/koga-miyata-catalogs" (forum rules don't allow me to post a link or photo yet) From the catalogs, this would be either from 1983 or 1984 from the topset aero shift levers, the logos and the graphics. The paint color makes it a 1983 Gents Touring, the catalog specifies this color as metallic champagne Y-88.
The “M” serial number prefix would be for a 1983 frame manufacture date from Miyata.
The 1983 Gents Touring had Shimano 600 AX crankset with Shimano “special” Deore pedals, KKT toeclips. In the catalog photo the pedals look like yours. As said Shimano DynaDrive pedals are a little complicated (I had disassembled, cla’d and reassembled a set so been there done that)
The catalog also specifies SR CT stem and SR CTD handlebar, Shimano 600 headset, 600 EX derailleurs and shift levers, 600 freewheel, Dia Compe 630 brakeset, black hoods. Original saddle was a black Miyata 77-S-DX with the Koga Miyata logo embossed on the sides. Generator and lights look all there. The catalog photo shows a large reflector above the rear fender at the top stay.
Looks like you have a very original and complete Koga Miyata! Suggest you only clean and polish it, please no repainting.
The “M” serial number prefix would be for a 1983 frame manufacture date from Miyata.
The 1983 Gents Touring had Shimano 600 AX crankset with Shimano “special” Deore pedals, KKT toeclips. In the catalog photo the pedals look like yours. As said Shimano DynaDrive pedals are a little complicated (I had disassembled, cla’d and reassembled a set so been there done that)
The catalog also specifies SR CT stem and SR CTD handlebar, Shimano 600 headset, 600 EX derailleurs and shift levers, 600 freewheel, Dia Compe 630 brakeset, black hoods. Original saddle was a black Miyata 77-S-DX with the Koga Miyata logo embossed on the sides. Generator and lights look all there. The catalog photo shows a large reflector above the rear fender at the top stay.
Looks like you have a very original and complete Koga Miyata! Suggest you only clean and polish it, please no repainting.
Last edited by TmMc; 07-06-23 at 08:00 AM.
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07-04-23, 11:46 AM
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Nice find! 
It's a 1983 model, the last year the "GT" was available. The serial number should start with an "L". This is what it looked like in the sales brochure:
On a side note: the one thing missing from your bike are the Shimano DEL-80 brake levers. Which is a bit of a shame, because they actually work quite well, compared to most other levers with extensions.
It's a 1983 model, the last year the "GT" was available. The serial number should start with an "L". This is what it looked like in the sales brochure:
On a side note: the one thing missing from your bike are the Shimano DEL-80 brake levers. Which is a bit of a shame, because they actually work quite well, compared to most other levers with extensions.
07-04-23, 05:18 PM
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Thanks for all the input everyone!
I’ve noticed the kickstand is missing and the RD is a Suntour Mountech, rather than Shimano 600. Same eta, but not listed on the sales catalog.
I’ve noticed the kickstand is missing and the RD is a Suntour Mountech, rather than Shimano 600. Same eta, but not listed on the sales catalog.
07-04-23, 05:48 PM
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Nice find!
It's a 1983 model, the last year the "GT" was available. The serial number should start with an "L". This is what it looked like in the sales brochure:
On a side note: the one thing missing from your bike are the Shimano DEL-80 brake levers. Which is a bit of a shame, because they actually work quite well, compared to most other levers with extensions.
It's a 1983 model, the last year the "GT" was available. The serial number should start with an "L". This is what it looked like in the sales brochure:
On a side note: the one thing missing from your bike are the Shimano DEL-80 brake levers. Which is a bit of a shame, because they actually work quite well, compared to most other levers with extensions.
07-04-23, 11:15 PM
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I haven't tried. The sets I have found so far were complete with the original hoods. Apparently those last well.
07-06-23, 01:38 AM
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You should be able to add it as text so we (I) can copy and paste it. My local CL has a ca.1988 Six Fifteen, and I'm curious.
And welcome! C&V is the best forum on the site.
And welcome! C&V is the best forum on the site.
07-06-23, 08:06 AM
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Korina, I tried that even with an incomplete website address. I tried and forum removed my post completely.
07-06-23, 10:11 AM
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07-06-23, 10:42 AM
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07-06-23, 06:21 PM
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a steal/
Joe didn't know what he had.
07-06-23, 09:01 PM
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07-06-23, 09:09 PM
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When I was younger I passed on this. Since then I’ve always kept my eye open for this color.
80?s Koga-Miyata Traveller « LocalBikeOutlet.com
80?s Koga-Miyata Traveller « LocalBikeOutlet.com
07-08-23, 01:40 PM
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