1975 RD125 Build

What if you radiused (sp?) the point at the top into a 1/2 inch curve, you would still have the room for the electrics and it would fool the eye. Just a thought.
 
Here's the intake adapter I'm thinking about. The VM20 carb is flange mount so no rubber boots to mess with. This part would be damn near impossible to machine in one piece but shouldn't be a problem for a rapid prototyper.

 
I don't know yet. I need to talk to my buddy who runs the lab and see what he recommends. I have a couple different machines/process to choose from and I need to see what is most resistant to gas.

I'm thinking I might have to coat the bore with some sort of solvent resistant material
 
Nice bike, I'm following your thread with interest. You could machine that in one piece with a 5th axis cnc :D . 3d printed parts are intended as functional prototypes and the material is subseptable to heat and light. Some printers are better than others but I often see part failure with de-lamination of the printed layers especially with thin wall section parts. You could print it in metal but it would cost more than you paid for your bike :-X
 
Check out http://www.shapeways.com/

They can print in various materials including metal. You send them your model, they send you your part.
 
Been doing some work and I got parts in today.

Tires and tubes


Poly Resin, CSM and gelcoat for my mold


and carbs!
 
used this as an injector tank on my mutant triple

lawnboy.jpg

bbo1-1.jpg

bbo29-1.jpg
 
I'm serious as a heart attack, I would restore the Lawn boy. I have a 1952 Lawn Boy, it says "Iron Horse" on the top, magnesium mower deck, pull cord that you have to manually wrap each time you pull. The fuel tank is the same as your's but red. It's too cool for school.
Cheers, 50gary
 
SquadraCorse said:
Check out http://www.shapeways.com/

They can print in various materials including metal. You send them your model, they send you your part.
Click to expand...

I checked this place out! Cool stuff - I'm hooked! Great place for ideas and prototyping parts. Not sure how accurate it will come out but it's purely for decorative or proto work.

I found this place that is similar but more for actual functional final parts:
http://www.emachineshop.com/

The cad software is free and pretty easy to use. You can even export files in DXF format. You can even have your model quoted instantly if you're online!
 
eyhonda said:
I checked this place out! Cool stuff - I'm hooked! Great place for ideas and prototyping parts. Not sure how accurate it will come out but it's purely for decorative or proto work.

I found this place that is similar but more for actual functional final parts:
http://www.emachineshop.com/

The cad software is free and pretty easy to use. You can even export files in DXF format. You can even have your model quoted instantly if you're online!
Click to expand...

Thanks guys, but I can do it for free at school. Cool site though.
 
Intake being printed in the rapid prototype lab. I don't know how much it costs but I think I pay enough tuition.







Finished the plug and started putting layers of release wax on it.



Then sprayed some hairspray on



Gelcoat on


Wetting out chop strand mat



CSM all torn up and ready to go on









Glassed on some supports so I can flip the mold over and work in it



AND WE GOT PROBLEMS! A really sticky mold release. Like, I cannot get it out. Ripped off the baseboard trying to pry it out.. I put 8 coats of release wax on this thing and it is STUCK. Soaking it in water over night and i'll try it again



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Ok, I got it out. Don't use automotive primer in your plugs, it doesn't work well with the styrene in the resin.

Gelcoat looks to be in great shape so I'm ordering my CF supplies today.

Getting a couple square yards of 3K 2x2 Twill and some epoxy from solarcomposites.com
 
Okay, so I got my first attempt at a carbon fiber seat done. I'm sorry I didn't get pictures of the layup process. It's almost finals week so I'm stacked with work and didn't have time to document the process.

It's made of four layers of 3K 2x2 twill and U.S. Composites medium pot life resin

The part was vacuum-bagged and autoclaved

It turned out pretty well with excellent surface finish and no porosity. The only issue is that I had some fraying of the carbon where some of the seams butted up against each other and assorted misplaced fibers. I'll give it a little sanding and trim the flange to finish it up.







 
I use pre-preg carbon and always vacuum bag in an oven I have installed n my garage. It works very well. You can weigh your component parts prior to layup and again after to calculate the matrix to resin ratio of the finished part.
70% carbon to 30% resin is ideal. Very nice work BTW.
Cheers, 50gary
 
Got the seat trimmed up, still need to drill holes to mount it. Got the frame painted with appliance epoxy (great stuff) and the triples/bars on

 
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