View Full Version : Overhaul: Two Classic Miyatas

10-17-2011, 07:09 AM
I've mentioned this to a few people on here, but I have an affection for classic cromoly Miyatas. Spell-check wants to correct the spelling to a Mazda, but I am in fact talking about the now classic Japanese cycling company.

Miyata (which was bought out by Dutch cycling brand Koga) has a storied history similar to how Yamaha made their way into engine making. The Japanese company's founder was a gunsmith who found himself in a predicament after WWII with a pacifist country and a suddenly unpopular skill. He turned his barrel making into bicycle tubes. For many cyclist, the pinnacle of cromoly steel bike construction was the triple spline butted Miyata 1000.

In college I had two rides: a Miyata 112 with upgraded components for training, and a Miyata 710 I used for commuting. After years of neglect, and some free time on my side, I have taken to overhauling both to carry me through the next few years. I'll share my passion for cycling in this project build.


Miyata 112 CRMO Frame


Shimano 105 Hollowforged II Gruppo
175mm Crankset x/53 - xgrams
Flightdeck II STI levers 9/10 - xgrams
Brakes - xgrams
Braze-on Front Derailleur - xgrams
Rear Derailleur 9/10 - xgrams
Front Derailleur - xgrams
Octolink 109.5mm Bottom Bracket

Seat + Bars
Profile Design Quill Stem - xgrams
Profile Design Drop Bars xmm - xgrams

Ritchey Aluminum Seat Post - xgrams
Serfas Gel Saddle - xgrams

Front Wheel
Alvin Alloy Rim - xgrams
x Spokes - xgrams
x hub - xgrams

Rear Wheel
Alvin Alloy Rim - xgrams
x Spokes - xgrams
x hub - xgrams
Shimano 6-Speed Cassette 12/24 - xgrams


10-17-2011, 07:17 AM
As you can see, the 112 is in poor shape. I have plenty of good dirt buildup from my time out west. Also, no one mentioned driving through western Colorado was like flying through an insect cloud. I get to clean the bug grave yard off as well.

Basically my plans are to strip both frames, deep clean all parts, strip the paint, and refinish to look like new. Let's start with the teardown of the 112:

The main decal has certainly lost it's luster.

Nice n' dirty near the bottom bracket. Tubing looks great though.


The STI levers are the worst looking of the bunch. I've been missing that cap for awhile now...

This is what clean looks like, next to filthy.

10-17-2011, 07:23 AM
I'll be grinding, polishing and buffing the road rash out.

Lower bottom bracket is too wide, so I am going with a brand new sealed unit. Ripped the decal on the set screw for the cable guides. I'll get a shorter screw for that.

My lovely 175mm right crank. That's a 53T chainring. I get plenty of torque with this monster. However...

That big ring is showing some wear. Missed the exact replacement on eBay earlier today. Damn.

10-17-2011, 07:24 AM
* * reserved * *

10-17-2011, 07:26 AM
* * reserved for more parts * *

10-17-2011, 07:27 AM
Extremely toxic Aircraft Paint Remover. It has to be strong to not only strip paint, but also the zinc oxide primer underneath. You've all seen the inside of a military aircraft with that ugly green paint color. Aircraft primer.

Not wanting to mess around; goggles, NIOSH mask, rubber gloves, covered arms and legs. I never wear contacts when I spray this kind of stuff incase it gets under the contacts and long term causes irritation.

I quickly masked the chrome ends to my front tube. I also plugged tube ends with cloth so I don't find paint stripper later on.

Set and ready for aircraft paint remover!

Paint peels off cleanly!


View of the lower triangle.

10-17-2011, 03:40 PM
This is a cool project. Something different to follow.

10-24-2011, 11:13 PM
The weather has been pretty great the past week, so I have been focussed on the yard with new exterior security lighting, winter pruning and getting ready for 6 tons of river stone coming on Thursday for a decorative riprap drainage feature. I have control of our garage for the week, so using a kerosine space heater, I have a nice workshop for my painting and staining I've been doing. Here is my update while the stripper eats paint. I'll take a rag to the mess later and have a nice steely looking frame to work with.

I used a razor blade to remove all the decals. On a tube, you set the razor parallel and work the decals until they're peeled. I used some paint thinner and steel wool to finish moving any plastic. Later when I repaint the frame, I will stencil and paint on new branding and decals.

Metal etching primer, paint and clear coat to come!

10-30-2011, 08:08 AM
Just an FYI on that stripper.

If your using it and breathe it too much, it will make you sick as hell for a couple hours.

10-30-2011, 09:06 AM
Just an FYI on that stripper.

If your using it and breathe it too much, it will make you sick as hell for a couple hours.

It's a well ventilated garage. I'm kinda paranoid about the chemicals in paint strippers. My grandfather was diagnosed with pulmonary fibrosis from inhaling them over the years and died a slow, agonizing death. I don't mess around.

I'm just working to finish the last flecks of paint with a blade. Frame looks awesome as the brazed joints look so clean and consistent.

Because I am not buying new hardware, such as a head, fork or stem, I plan on replacing the bearings on the fork. The bearings I pulled were terrible as many were shattered or cracked.

10-30-2011, 03:34 PM
Cool project, never seent hat aircraft paint remover in use, I'll have to get some of that stuff.

10-31-2011, 05:57 AM
yes it works REALLY well. its what i used when i painted my wheels a couple years ago.

Also really cool priject. interested to see the finished products.

10-31-2011, 05:02 PM
Cool stuff.

11-01-2011, 09:08 AM
Below you can see the reason why brazed bikes have such a comfortable ride. Having brass brazed joints means they have a softer give on harsh road surfaces. Welded steel frames are harsh and heavy. Materials like aluminum, titanium and carbon fiber are much stiffer so you get to feel the road.

I used an old seat post and a vice bench to hold everything for priming. After stripping all the paint, I gave it a nice sanding to remove oxidation.

Primin' Station

Brass alloy brazed joints.




11-02-2011, 07:10 AM
Base coat went on. Black Gloss by Montana (Spanish company). They make dope products for art applications. I think you will all enjoy the next coat that goes on...





11-03-2011, 11:09 PM
Still looking good man.

11-14-2011, 07:36 PM
I have put on the final top coats of paint and with the final colors for the bike. We have been blessed with some really warm weather the past few weeks so I've been able to get the painting done in quicker time. With the paint cured long enough for detailing, I have moved on to that.

The fun part has been the decals. I opted to go for 3M ScotchPrint 1080 Vinyl Car Wrap Film. Fortunately for me, when ordering from 3M's website, they listed I could have 5 sample packs. Having a legit design business, I ordered under that moniker and had a fun conversation with a rep. A week later, I have been printing the cut marks on the backing, cutting out the letters, and I am now applying the decals to the frame.

Sure, a little tedious, but I get to use any color scheme I want. Best part is, the film is good for 3-5 years in weather, but can be sealed permanently with clear coat. I will go with a really hard clear top coat to take abuse, then wax before I reassemble.

Progress thus far:



As you can see, I accented the triangle in the "Y" using a metallic blue. When I apply the decal for the downtube, I'll reverse the color scheme with metallic blue letters and a yellow accent on silver. I'm debating whether or not I want to wrap a line band around the tubes like they have on other classic frames making a ring before and after "MIYATA". I'd likely do two colors on each ring, one white, one metallic blue.

11-14-2011, 08:06 PM
Wow, that looks great!

11-15-2011, 08:32 AM
Thanks mang!

Here are all the decals on. Time for clear!

Completed decals!

Miyata gear icon. (Cutting a circle was fun, I used an xacto/compass hybrid. Almost removed my fingers!)

Shimano 105 icon.

Just to show you, all the decals are precision cut by me! I printed the icons on the vinyl backing after designing them in Adobe Illustrator. Each square on the my cutting mat is 1" by 1" so you know how small these are.



This is what happens when you forget to invert the cut lines!


11-15-2011, 08:31 PM
very cool, how many decals did u mess up while cutting them?

11-17-2011, 09:03 PM
very cool, how many decals did u mess up while cutting them?

I cut extra decals because it's easy to line up the cuts using a straight edge and knife when they're arranged in a grid. When a cut doesn't go how I want, or the decal is slightly imperfect, I can choose the better decals. I have about 8-9 rejected decals. This is a technique taken from architectural model making. Make extras, reject the lesser parts.

I always love working with aluminum because it is such a soft metal. I took the road rash out of my rear derailleur using a wire brush wheel, grinding stone and wet/dry sandpaper. I finished with my tried and true polish, Wenol (http://www.wenol.com/).

I'm pleased with the results.

Road rash.

Cleaned gouges and shaped edge using wire wheel brush on a hand drill. Dremel wheels are too small, and a 2 inch wheel worked perfectly.

Wire brush wheel result.

Started using the grinding stone on a dremel. Overkill on aluminum, so I just ground the surface by hand.

Grinding stone result.

I made a sanding stick out of 2000 grit wet/dry sand paper. After revealing a few remaining gouges, I went back and ground them out with the stone again. Better to remove less material then too much.

Sandpaper result.

Application of Wenol.

Wenol metal polish result.

I'll likely go over all of my parts again with Wenol, mineral spirits then wax to seal them for use this winter. This part took about 30 minutes to repair.

11-21-2011, 01:07 AM
Picked up this gem today, a Forté Pro TT Saddle. Performance Bike has them on Black Friday special for $40, down from $60. I picked it up locally for $10. 247g of titanium alloy goodness.


I'll have the rest of the bike polished and assembled tonight! Then I can go for a nice, crisp morning ride tomorrow.

12-03-2011, 04:15 AM
I've had my bike basically wrapped up for a week now, but I got a gift card for my birthday and put it toward a couple things.

The silicone hoods on my STI levers are in awful condition. It's like gripping gum. I found a new set of hoods that will fit and not rub gunk off on my hands as I ride. I also got a 6/7/8 speed Shimano hyper-glide chain. I have a SRAM "Shimano" compatible chain I've been using, and honestly, it shifts like crap. If you want to protect your cassette and crank, get a real hyper-glide chain. I'll be getting a 9 speed chain in a month, more on that later. Lastly, I got a cable tensioner nut that goes on my rear derailleur, as mine has sheered off.

Note: I found my flash!

I'm gonna lube everything up tonight and get some picks of the finished results for tomorrow. Overall I am very happy with how everything turned out. This will be great for long climbs and training.

12-03-2011, 04:39 AM
This is an awesome project! Loving the paint job. I'm just getting into cycling myself, got a cheap road bike(off kijiji) and a mountain bike. However, I have money set aside to drop $1000 on a proper entry level road bike next spring. Thinking about a Specialized Allez (they were on sale at the bike show for $650!) or a Fuji bike.

Can't believe you got that seat for $10

12-03-2011, 07:57 AM
Winter is always a great time to find 2011 deals on Road Bikes before spring 2012 prices. Champion a local bike shop with experience and ride a few. They'll help size and fit the perfect bike to you. You won't regret it, especially your nether-regions.

My night just got better. I'll explain.

I mentioned earlier that I was getting a 9-speed chain later this month. I'm glad I waited. Reason being, I picked up a used 9-speed 105 cassette off of eBay. It was filthy, got it for a low price (because of filth) great condition. It's been soaking in a container of mineral spirits for about a week. Tonight I was fishing out the cogs, 1 by 1, to scrub and polish them. I went to fish out the spacers, from the now blackened fluid, and I pulled another cog out. 10?

Somehow I had missed the fact that I had gotten a 10-speed cassette instead of a 9-speed cassette. They guy selling couldn't count! Glad I hadn't ordered my chain yet! Here are the pics: