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Stainless Steel Bike

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x-90 rider

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Post Sun Jan 24, 2010 9:33 pm

Stainless Steel Bike

We need a new bike for the shows this year but I do not have 300-400 hours to put into a project right now. I really wanted to build a street legal mini Servi-Car with a titled X-90 that we have in our shop but it will have to wait. I just can not dedicate enough time to fabricate the fiberglass fenders and storage trunk. After looking around I found a set of plans for a Tom Thumb bike in a 1970 Popular Mechanics magazine. This looks like a good project that does not require a lot of time. I am making as much as possible out of polished stainless steel. As soon as the bike is finished I will fabricate a stainless steel sidecar for it. Here are the plans. http://books.google.com/books?id=5dcDAA ... q=&f=false

In 2006 I fabricated the X-90 trailer.

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I kept the left over tubing and I am going to use it for this bike. It is 304 prepolished stainless steel.

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I dug out my old tubing bender and proceded to make up the frame tubes.

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The plans call for the neck to be made from the same tubing as the frame. I thought that it would be better to make my own frame neck with bearings in it.

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I grabbed a chunk of 304SS scrap out of the bin and chucked it up in the lathe. After drilling the center hole, I counterbored the ends for the bearings.

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Since the tubing is all prepolished I had to buff the neck tube too.

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I assembled and tack welded the frame on my lay-out table. You can really get a nice size comparison in this photo.

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Here is an article and photos of a completed Tom Thumb bike. http://www.oldminibikes.com/forum/proje ... -mini.html
Last edited by x-90 rider on Fri Jan 29, 2010 8:12 am, edited 2 times in total.
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fastsporty77

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Post Mon Jan 25, 2010 6:14 am

Re: Stainless Steel Bike

SS is abit heavy aint it?
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Blaz

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Post Mon Jan 25, 2010 6:46 am

Re: Stainless Steel Bike

Very cool, what kind of motor do you have in mind?

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x-90 rider

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Post Mon Jan 25, 2010 7:11 am

Re: Stainless Steel Bike

The tubing is light. I am using 7'8" OD x .065 wall thickness.

Blaz, I have (3) Ohlsson & Rice engines from the 60s that are runners. I figured on black powder coating the starter and heat shields. Fab up a polished stainless steel header and a rear frame mounted stainless gas tank. I also finished the sprocket drawings so I should be able to make stainless sprockets and polish them.
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Road

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Post Mon Jan 25, 2010 7:29 am

Re: Stainless Steel Bike

Very cool,but heavy I supose.
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x-90 rider

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Post Mon Jan 25, 2010 7:33 am

Re: Stainless Steel Bike

Road wrote:Very cool,but heavy I supose.


The finished bike and sidecar should weigh less than 50 lbs.
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CrusherTx3

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Post Mon Jan 25, 2010 11:20 am

Re: Stainless Steel Bike

great fab up work
lets burn a tank of gas and ride somewhere !

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tofeather

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Post Mon Jan 25, 2010 12:24 pm

Re: Stainless Steel Bike

8) project. I pulled a small mini-bike out of a pile of trash up in the hill country a few years ago. I've thought about re-makeing it, the fram was seriously bent, but the motor and front end look pretty good. I have some old mo-ped stuff hanging around, like a seat and some controls.
Hmmmmmmmmmmmmmmm, maybe :roll: :?: :roll:
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fastsporty77

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Post Wed Jan 27, 2010 6:51 am

Re: Stainless Steel Bike

[quote="x-90 rider"]The tubing is light. I am using 7'8" OD x .065 wall thickness. O.K I see now.
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x-90 rider

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Post Thu Jan 28, 2010 6:12 pm

Re: Stainless Steel Bike

I finished welding up the frame and then polished out the welds. Can you pronounce sssslllloooowwww?

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The neck area was tough because it is hard to get between the tubes and the neck.

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Blaz

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Post Thu Jan 28, 2010 6:24 pm

Re: Stainless Steel Bike

Very nice, you are quit the welder....
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x-90 rider

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Post Thu Jan 28, 2010 8:21 pm

Re: Stainless Steel Bike

Blaz wrote:Very nice, you are quit the welder....


I was nervous so I watched my old "How to Weld" VHS tape 3 times and took some notes. Then I sharpened up a .040 piece of 2% Thoriated tungsten and locked it into my TIG torch. I had to bring over an extra bottle of Argon so that I could put about 2psi of Argon into the tubes while welding. Once I had everything set-up, I sat down, hit the pedal and let her burn. :mrgreen:
Now I have to decide how high to mount the axle to get the desired ground clearance. Then fit the engine so that I can fab and weld in the motor mounting plate. Ah, 1 step at a time. :roll:
Last edited by x-90 rider on Fri Jan 29, 2010 5:41 am, edited 1 time in total.
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Blaz

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Post Thu Jan 28, 2010 9:02 pm

Re: Stainless Steel Bike

Good old VHS....
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Bustah_c

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Post Thu Jan 28, 2010 9:58 pm

Re: Stainless Steel Bike

Damn, I envy you guys who can do this stuff.

To me, it's miraculous what you done. Very impressive.
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tofeather

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Post Fri Jan 29, 2010 9:57 am

Re: Stainless Steel Bike

Looking good, Very Good. I'd like to get a copy of the VHS tape on welding, I had some "Instruction" and a book, but that sounds good, you can watch it over and over.
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x-90 rider

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Post Sat Jan 30, 2010 7:38 pm

Re: Stainless Steel Bike

I started on the front forks today. The first thing was to put a piece of scrap stainless in the CNC machine.

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An hour later this is what came out of the machine. Now I just need to prepolish it before welding in the fork tubes.

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Blaz

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Post Sun Jan 31, 2010 10:55 am

Re: Stainless Steel Bike

Great job X you are quite the fabricator, maybe you could get a job at OCC...
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x-90 rider

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Post Sun Jan 31, 2010 12:14 pm

Re: Stainless Steel Bike

I finished the triple tree plates so now I can start on the fork tubes.

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tofeather

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Post Mon Feb 01, 2010 10:56 am

Re: Stainless Steel Bike

They look GREAT. You lucky bastard, having all that great equipment to work with. :mrgreen:
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x-90 rider

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Post Sun Feb 21, 2010 7:06 pm

Re: Stainless Steel Bike

I finally had time to weld up the front forks and try to mock up a roller. I need to buff out the front end welds and then start machining the wheel hubs.

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Last edited by x-90 rider on Sun Mar 28, 2010 7:44 am, edited 1 time in total.
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Blaz

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Post Sun Feb 21, 2010 9:15 pm

Re: Stainless Steel Bike

Great job X I need to get back to work on the LBW bike....
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larry

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Post Wed Mar 17, 2010 8:17 pm

Re: Stainless Steel Bike

I can see why you like to spend so much time in the shop, nice work and nice weld job.
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x-90 rider

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Post Sun Mar 28, 2010 7:48 am

Re: Stainless Steel Bike

I mounted the seat and fabbed up a stainless fuel tank. Now I just need to find time to make a stainless billet fuel cap. :shock:

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Blaz

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Post Sun Mar 28, 2010 9:18 am

Re: Stainless Steel Bike

Nice job X great work very impressive!
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x-90 rider

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Post Sun Mar 28, 2010 11:12 am

Re: Stainless Steel Bike

Thanks, my buddy in Parma, Ohio, did a great job on the seat. I gave him the frame and he matched the frame contour perfectly.
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tofeather

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Post Sun Mar 28, 2010 7:52 pm

Re: Stainless Steel Bike

Yeah Man, that looks 8) Great job on the seat and the frame.
About 4 years ago a pulled an old mini-bike out of a pile of junk up in Bristol, N.H. I volunteered to help clean up a yard after a close friend's brother passed away. The Mini-Bike had been run over with a farm tractor, then a tree fell on it crushing the gas tank. Other than NO Seat, it looked complete, Oh yeah, no chain. I stuck it out back but had looked at it once or twice, The motor was locked up and the frame was pretty well bent.
Today I decided to tear it apart to see if, Maybe, it was "Fixable". :roll: I first decided to use a small bottle jack and see if I could get the biggest dent out of the frame. Got it to budge a little, but the motor was in the way. Yanked the motor and half tore it apart. Gave it a good soak with half a can of "Rust Buster". I managed to get the frame back close to where it should be but in the process the motor mounts, two strips of 1/8 " x 1" steel got very distorted. I'll hafta cut them out and make new parts there. I removed the pull-cord starter assembly and removed the head. A couple of whacks with a piece of wood and a dead blow hammer and the piston freed up. I cleaned off some of the crap from around the valves and got it to turn over completely. Put the head back on and only 2 - 3 ft. pounds of torque and it has some compression.
There's a tag that says TOYOCO Motors, somewhere in PA. No year on the tag but a short serial number. No sure of the motor but it looks like a small Briggs & Stratton. I'd like to get it going, as it would be a great "Campground" scooter, especially if I ever go back to Strugis.
Anyone ever hear of a TOYOCO mini-bike :?: :?:
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tofeather

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Post Mon Mar 29, 2010 9:54 am

Re: Stainless Steel Bike

I "googled" Toyoco mini-bikes and found several pictures of some made in the 70' & 80's. All have rear suspension. Mine is "Hard tail". I found another site that has a picture of one like mine that's in Australia, called the "Alligator - 100". One shot shows the mfg. tag and it was made at the same place in PA. Both stories mention B & S motors of various H.P. ratings. I should have taken pictures of it before I started to stretch it back into shape.
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tofeather

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Post Mon Mar 29, 2010 3:17 pm

Re: Stainless Steel Bike

Today I went to Hudson Small Engines, he identified the motor as a Tecumseh 3.5 horse. He had a better than stock spark plug, but no other parts. He did give me the name of another "Small Engine" guy who I will call later.
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x-90 rider

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Post Tue Mar 30, 2010 4:26 am

Re: Stainless Steel Bike

Hey Tofeather, great find, once you ride your bike at an event you will wonder why you did not have one sooner. It sure makes getting around a lot more convenient and it is easier to park than a golf cart. :mrgreen:

http://www.minidoodle.com/id237.htm

http://www.oldminibikes.com/forum/what/ ... co-pa.html
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tofeather

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Post Tue Mar 30, 2010 8:15 am

Re: Stainless Steel Bike

Thanx X-90, the second link shows the exact bike, only mine has (had) a gas tank on the frame, kinda like a small "Peanut" tank.
I would have loved to have one out in Sturgis, the campground @ Broken Spoke/County Line is HUGE.
I have to fab a new mount for the motor, I'm thinking of a flat steel plate, a little thicker than what's there (two strips across the lower frame), that would have four holes for the motor to mount to.
Any input is greatly appreciated.
Thanx Again.
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