jayd2

I’m building a 1900’s style board track racer motorcycle using a Worksman industrial frame and I will need to increase the length of the top tube by 4” and modify the shape of the down tube, the lower top tube is fillet brazed it will be replaced.

There are two ways to accomplish this, one is to heat the lug/tube to soften the brass enough to free the tube and the second is to cut the tube and add a 4”. The problem with the first option is that the lugs will have to be heated to remove the tubes then heated again to braze in the new ones, the lugs will have been heated a total of 3 times, would the affect lugs structural integrity? The second would be to lengthen the tube by adding a section with a custom made tube that would be inserted inside the tubing extending past each end of the splice with plug welds (brazed) to add strength.

Which would be the best option?