1987 Miyata Terra Runner

[horsefarmer]

Pic from the interwebs, what it should look like complete.

What it looks like now minus wheels (26")
Original nice wheels are long gone. Roadmaster front wheel and Alex X-rims rear. Both have issues, front hub has broken race and loose wheel flops around.

Rear rim is out of true, was going to try to adjust spokes, but both wheels have Schwinn tires and Slime filled tubes, Uck!

Most everything is Shimano Deore.

Pretty paint job is a light purple metallic.

Great frame. going to be totally gone thru.

Would you believe this is a shift cable?

Looking thru my stash for better wheels.

 

[sandman]

Nice project horsefarmer . I have a 1985 Schwinn Sierra frame and have collected a lot of same components you have , so I will be following this build closely .

 

[MattiThundrrr]

Nice bike, that Deore is the good stuff.

 

[pebblewurm]

I love the slack geometry and long wheelbase on 1980's mountain bikes- makes for a comfortable and stable ride.

 

[SpikeFC]

Love it! I was thinking of building some oldschool MTB on top high-end parts, but it's still out of my money reach. There even was one for sale a few months ago - full-suspension, full Deore XT (with canti brakes), and Fox suspension... but it was priced 600$ and that's still like 3/4 of my monthly salary.

 

[horsefarmer]

Dug thru stash and found a couple of wheels from a Schwinn Frontier.

Donor was a ladies frame and also way small so I stripped for parts. Alloy rims, Shimano hubs and quick release skewers. Bike had little use but must of been hanging in the rafters and has a thick coating of that tobacco scum I used to clean off of the inside windows of cars. Lotsa scrubbing l to remove.

Had a couple of Pannaracer 26 x 2.0 tires - looked puny on a cruiser but nice on this.

Tiny dropout adjuster screws provide precise rear axle alignment.

Bottom bracket brakes!

 

[Dr. Tankenstein]

We used to call those bottom mounted brakes....’mud catchers’


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[pebblewurm]

The chainstay mounted brakes work great as long as you are not riding in mud. The frame there is just a little bit stiffer than at the seatstays. They do get goobered up in rain snow and mud.

 

[horsefarmer]

Removed these rusty brackets - maybe fender mounts?

The rear derailleur thumb shifter switches from index to friction!

Seat post not stuck. It is extra long and includes mfg. date of 10/87.

Ritchey grips look like black rubber but actually clear silicone and very very dirty.

Rear derailleur is worn out and I will replace it.

 

[SpikeFC]

I see a problem with the brake and chain running properly... Unless you change the cranks to 1 speed

 

[Dr. Tankenstein]

I wonder if those pieces of metal were ‘mud scrapers’......


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[MattiThundrrr]

Miyata literature lists the holes as "fender bosses"on the front, "carrier bracket" on the stay, but I can't find any pictures of them with fenders installed.

 

[horsefarmer]

I see a problem with the brake and chain running properly... Unless you change the cranks to 1 speed

Switched through all 3 rings skipping got bad on the big ring in front and the larger cogs on the rear. What do you see?

Miyata literature lists the holes as "fender bosses"on the front, "carrier bracket" on the stay, but I can't find any pictures of them with fenders installed.View attachment 112176

Both mud scrapers were held on with identical 10mm headed bolts. Back used alum spacers and a nut like a side pull brake mount, and the fork is tapped in the crown so no nut. Maybe back in the day plastic fenders were molded around the brackets and they are long gone now...

 

[sandman]

I like mud scrapers better !

 

[MattiThundrrr]

Lol the mud scrapers on that bike are mounted under the chain stay

 

[horsefarmer]

Found an Shimano Acera RD-4400 in the stash.

The old Deore derailleur was really wore out at the pivot point for the jockey wheel cage.

Too bad. The jockey wheels on the Deore have sealed ball bearings and seem to be metal maybe they will fit another derailleur?

Chain line looks good and shifts well except the "Index" seems sticky - sometimes jumps a cog but if you move the shifter handle to remove the play it doesn't. Works great in "friction" mode.

Don't know if I can lube it or what. I may try some trigger shifters I have.

Trying some different bar stem combos.

 

[MattiThundrrr]

That jockey wheel looks cool with the holes. Perhaps could be repurposed as a tensioner on a single speed build.
I don't know about the thumbies specifically, but shimano's rapid fire shifters are known to malfunction when the lube they use gets old. It gums up the works. If you have an access port underneath the shifter, spray some cleaner in and operate the shifter to flush out the gunk. Then add your own lube. Not saying it applies to your shifters, but it's something to consider.

 

[SpikeFC]

View attachment 112207 View attachment 112208

Chain line looks good and shifts well except the "Index" seems sticky - sometimes jumps a cog but if you move the shifter handle to remove the play it doesn't. Works great in "friction" mode.
View attachment 112209
Don't know if I can lube it or what. I may try some trigger shifters I have.

You can lube them - if that does'nt work the problem might be from the difference in producion years of components, and the gap between them (technicly Shimano groupsets can work with parts up to 1 set higher or 2 sets lower, but I already seen combinations of Acera-Deore that didn't wan't to work with each other)

 

[horsefarmer]

Cleaned mech on existing shifter but not happy how it shifted in SIS mode. Had these combo units in my stash from same bike shop girls Schwinn that wheels came from.

New shift and brake cables, new brake pads next!

 

[SpikeFC]

View attachment 112470 Cleaned mech on existing shifter but not happy how it shifted in SIS mode. Had these combo units in my stash from same bike shop girls Schwinn that wheels came from.
View attachment 112471

EZ-fire! My girlfriend has them on her 1990 (or something like that) Meteor.