Hello from Tunbridge wells

[Involute]

A motorcycle usually has a swing arm at the rear and forks at the front, in this case we need a swinger at both ends…..


this first image is the matching of the tooling to bend T45 oval tubing, this was very problematic I did it cold, filling the tube with sand and making a rocking arm fixture that stretched the tube in small increments.




after several attempts I got these.


Front axle boxes

weld in the ends

embryonic swinging arm


Front and rear swingarms, after powder coating, I can’t find more pics of the fabrication.