Hey anyone here ever hear of a Unis Folding Bike.
I recently aquired one for 50 dollars and was wondering
if it was something worth leaving alone or if i should go ahead and
"Customize" it ?
Thanks

Which will make you more likely to ride it?

Why don't you post a picture or describe it? Did you buy it new or used?

I bought the bike Used but it is in Brand new condition from what i can get from the decals it is made in Yugoslavia 1980 it has full fenders 20in tires with a 3 speed rear wheel. I would gladly post a pic but recently got clipped by a car whilst riding my track bike and damaged my camera.

im gonna run back to comp usa and have it replaced (glad i spent the extra money on the "Gold" protection plan) as soon as i have it back in my hands i will post a picture should be sometime sat. afternoon

and in response to "Which will make me most likely to ride it"

I kinda like it the way it is but would like to paint it and maybe change the bars and seat and strip the fenders off.

I Have seen some very good results achieved with a spray can .I am guessing it is a simple folding shopper bike . I had a single speed klapprad but gave it to someone cheap they were very careless with it and it was stolen. I was glad it was though, because they made it look horrible .It was torture to look at it.I am looking forward to seeing your yugoslav Bicycle.

Careful with the Yugoslav cycles - I had a folder from Yugoslavia... *very* non-standard bottom bracket. Keep the original parts.

very non standard .... lol had me smiling for sure ...

its kinda funny that the guys in the shop call their tools standard while they call the metric ones metric...
to me what the rest of the world uses is standard... or ??? lol

most likely a cheap folder from the early 70 made in Yugoslawia... they had thompson style bb's in them. the ones with the cotter pin ...

good advice to be carefull with the parts, you might need them ....

Thor

Indeed on the Thompson style bb. That's what it had as near as I can tell. Diameter too big for a cartridge style bracket (and unthreaded) and too small for a 1pc system.

you might be able to convert to a modern 3 pc bb . Check with Sheldon Brown give him a tinkle on the telly ,9a to 5p eastern.

If its a Thompson, his likely answer will be along the basic lines of "we don't stock any parts for that" and/or "best not to bother with it"

But I don't want to speak for the man, he's around here somewhere, no?

I have seen Raliegh Folders converted to modern 3 pc hubs . I think the last person to fix up a raliegh folder must have done that . I think they originally had 3 pc cottered cranks.

Twentys can be converted, I'm working on one right now - their bottom bracket shell is/was much more common (the threading on the other hand). The last yugoslav bike I was working on... the shell could not accomodate a new cartridge or a BMX style 3pc... and it was unthreaded. I have pictures somewhere - with a caliper and a quarter for reference.

I bow to your superior knowledge.Hai!

Heh, trial by error... sadly... but that's how we learn I reckon... or it seems to be how I learn.

Unis is from Yugoslavia.
Model of folding bike was Adriatic. Something like Rog's Pony.

Dude, this thread is literally from the last Generation. When someone suggested giving Sheldon Brown a call I was like, wait, what? Come on, level with me. Did you, or did you not, know this thread is not just old, but ancient? No anger (yet) but really curious how this works. I can't even find the first post I ever made on BF.

I've finally learned to ignore people who post in necrothreads. It takes effort sometimes, but it'll save you some grief. Take my word for it.

What if someone destroyed balls bearings for the bottom bracket and can't find any balls bearings that will fit it what can I do to get it fix because I like the bicycle but I been trying to fix I was riding it next thing I know it balls bearings was destroyed beyond fixable

This is a Dead Thread Walking, anciently old, a new record, and now reanimated to Zombie Thread Walking; It is a common newbie mistake to see and post on one; You see recommended threads by The Algorithm (all hail our Algorithm overlords), without noticing the posting date. No worries, it's something we all learn.

I will answer your question because it is easy. If the bottom bracket is old style cup and cone, meaning loose ball bearings, replacement balls are easy and cheap to find at bike shops or online. If they are of an unusual size, a visit to an industrial hardware or bearing supply company, and bring balls, spindle, and cups, and I'm sure they can find something that works. In Detroit it was Detroit Ball Bearing. In Seattle it's Tacoma Screw. However the cups (outer races) and spindle (inner races) are not found at bearing suppliers, so if damaged, you need to check with a bike shop that handles older designs. If no replacements available, if you are handy and have tools, you might be able to restore the spindle by mounting in a lathe and fixing a small rotary grinder like a Dremmel tool, or air grinder, to the carriage, and carefully re-grind the surface as the spindle rotates, sort of a poor man's jig grinder. Same for the cups. I've done crazier things to fix something.

If the bottom bracket is threaded to a standard bike size, you can replace with a bottom bracket "cartridge" bearing, if it will fit the crank.

If the bike has individual sealed bearings at each side and pressed in, replacements are also at bearing supply companies as noted above, they can measure, or more likely, view the tiny numbers on the side of the bearing and cross-reference to a new replacement bearing, however you will probably need a bike shop to replace the bearings.

Many solutions are possible, but it starts with a bicycle mechanic/technician with excellent knowledge of all bottom bracket types.

Welcome to the forum.