CB750 chopper/ scratchbuilt brass frame

[LDO]

In 1/6 scale

The hard part of the frame is done. That's Tamiya's engine, of course. It's getting narrow tires. It has 50deg of rake. This is my first attempt at a big scale frame. I built one years ago in 1/12 scale from copper, but this was a lot more work. Copper that's half this size is a lot easier to bend.

[Chuck Most]

My, that frame is gorgeous! I'll certainly be watching this one.

[DanielG]

Only metal has the feel of metal.

[W-409]

Nice frame! Was it hard to make? I've been thinking of the same thing, because I have one Revell Chopper, and it looks too modern styled for me. I must modify the frame alot, so I've been thinking of building it from brasstube. Nice job with it so far, I'll keep watching this project very surely.

[LDO]

Nice frame! Was it hard to make? I've been thinking of the same thing, because I have one Revell Chopper, and it looks too modern styled for me. I must modify the frame alot, so I've been thinking of building it from brasstube. Nice job with it so far, I'll keep watching this project very surely.

Yes, it was hard to make...well...I had some problems to solve, anyway. Brass tube in .1875" diameter (4.76mm) is hard to bend. I ended up making relief cuts to make bending easier, then soldered the bend in place. It's also not easy getting both bottom tubes to be mirror images of each other. What I did there was solder two tubes together, then bent the front downtube and rear kickup. That way they were both identical. To get the downtubes to angle in toward each other, I cut the frame in the middle and added a smaller piece of brass inside to hold them together. When I was happy with the angle, I soldered them back together. After solving these problems, it was not so bad. The next one will certainly be easier.

[W-409]

Yes, that's pretty hard to bend, but I have always heated the rod as long as it takes to be "red hot". Then I've put it to sulphuric acid and when I take it away, some wash with water, then it's useable and bending gets much, much easier. I have made one tubeframe, one Drop Axle and one ring from brassrod. That will help when must bend those, it's very simple too. But anyway, your project looks very good to me, I keep on watching this one surely.