9volt 

Here's a neat old Miyata that followed me home.



Dura-Ace crankset and levers





Really like this head badge





4140?



Looks like it might be a 74 P-1

https://www.velo-pages.com/main.php?g...serialNumber=2

9volt 

Current pics:

bikemig 

I like it. I don't think I've seen a 4140 chrome moly tubing sticker before (as opposed to say 4130 chrome moly) but apparently it's a real thing,

https://en.wikipedia.org/wiki/41xx_steel

Cool.

9volt 

Mocked up with proper pedals, saddle, post, and wheels.

It would be helpful if someone could confirm the seat post diameter on this frame. The post on it was too small. I've got a 26.6 in there now, might take something larger.



Top tube has some cable clip chew marks. No dents though and it looks like it might be chrome under that paint. Needs some attention.

Bikerider007

Cool find!

9volt 

Frame dimensions are are kind of odd. 21" CTT seat tube and 22.5" CTC top tube. I normally ride 22.5" TT frames but they usually have ~22" seat tubes.



Will this fit my short legs/long torso? Not sure. Must tear down first.

T-Mar

Yes, it's a Miyata P-1 Professional, circa 1972-1974. The serial number will narrow down the range.

Edit: During this period Miyata was building with Tange tubesets. Champion #1-#3 all used the same seat tube, with a nominal 26.8mm inner diameter. Standard clearance allowance would result in 26.6mm post. However, Mayata typically performed a ream/hone of the seat tube and 26.8mm posts are common. It could have come with 26.6mm or 26.8mm.

The wheels are not proper. This was a racing model and came with a tubular wheelset equipped with large flange hubs.

wrk101

Some of the Japanese bikes from that era had crazy long top tubes compared to seat tubes. I've got a 53cm ST ctt, 58cm TT ctc in my backlog right now. Oddest one I have is 50cm ST, 57cm TT.

9volt 

Thanks for the seat post and tubing info! The wheels were here on the shelf. The set it came with were nothing special. Not planning to run tubulars but will keep an eye out for a wheelset with early high flange Shimano.

When I said mocked up with proper parts I meant reasonably era correct. The seat, post, and pedals are wrong as well. I'm pretty sure it needs KKT Pro Ace rat traps, SR Royal 26.6/26.8 post , and an unobtanium Fujita saddle. I actually need 2x Fujitas to get one on my Fuji Newest. Feel free to PM if anyone has that stuff available

The serial number is B468696

Post a pic of that 50/57 frame in here if you get a chance. Would like to see that one.

9volt 

Progress



! SPORTS MODEL !

Any thoughts on what the yellow sticker remnant used to say or look like? I'm thinking Made in Japan

9volt 

Parts

3speedslow

Nice! Your frame has the same measurements as my early 70's SHS Sekine.

9volt 

Top tube before and after. The majority of the funk is out of the paint and the battle scars look better in person. Most parts are hung.

Cable housing suggestions? I'm thinking one of the colors in the head badge.

9volt 

Interesting. What size frame do you normally ride and how is the fit on the SHS?

obrentharris 

Now I see why you are looking for transparent green cable housing!
I have transparent blue if you can't find the green.
Brent

9volt 

^ Thanks, blue is my second choice right now. I'll let you know if green doesn't turn up.

devinfan

Love it. Super cool graphics and chrome lugs! Transparent housing would look dynamite. Porkchop BMX has all your retro housing needs, I’ve bought from them many times.

devinfan

Okay I unintentionally lied, just went on the Porckchop website and they have every colour under the sun EXCEPT green .

Bikedued

Wow, VERY similar to my Volkscycle Mark 100 lugs. It was also chrome under the paint, same dropouts IIRC, and same component spec.? Same bar end shifters and all. Eery! Mine even had the same brakes, though in the older Dura Ace name, which was changed to Tourney. Any connection between the two brands that you know of T-Mar?,,,,BD

cdmurphy

Very cool! I had one of these that I picked up as a frame / fork off eBay a few years ago. I really liked the ride, but it was on the smaller side for me, and the chrome was only so-so. I wound up putting it back up on eBay to make room for my current squeeze - a 1976 Centurion Semi-Pro.

That decal is probably the remains of another 4140 decal. I actually did up graphics files for my decals, as several of them were in pretty poor shape, and I was considering repainting the frame. If anyone is interested in having them reproduced, I have them as vector based illustrator Miyata-Professional--Combin by c79murphy, on Flickrfiles.

Regarding the long top tubes -- until the late 70s - early 80s, almost all production frames from a given maker were made with a single size of top tube. 49cm frame? Here's your 57cm top tube. 65cm frame? Here's your 57cm top tube. They would just use a shorter stem on the small frames, and a longer one on the larger frames. (This is actually good for me, as I need a tall frame, with a short top tube to fit my long legs / short torso body.)

Here are some photos: https://flic.kr/s/aHskAmgBJo

DSCF3032.jpg by c79murphy, on Flickr

AustinFitz

What a lovely bike! While most people drool over the Italian stuff, it's always been the Japanese bikes that really turn me on!

jj1091

Probably a bike shop decal. According to the catalog pics, there wasn't any sticker below the Sports Model decal.

Miyata catalog (1974)

9volt 

Thanks for the pics! The polished calipers look great.

9volt 

The stock cables on the Miyata are interesting. The derailleur cable that came with 1st gen Dura-Ace bar ends is teflon coated:



Are these ball end brake cable ends Dura-Ace specific? Can they be replaced with a common road brake cable? Haven't run into this style before.



The plan is to save these off the bike and run new cables. Probably modern teflon derailleur to match the original look.

cdmurphy

I actually swapped all the parts for my Miyata P-1 over from a Volkscycle Mk 100. You're right, the lugs are the same, but that's about it. The geometry is different (59cm top tube on the Volkscycle), and the seatstay treatment is much different too (half cutaway caps the Volkscycle). The Volkscycle frame was manufactured by Araya, and appeared to be identical to their "Araya Rex" model from the early 70s.