This is the XR69 we campaigned in 2019 in the classic superbike race at the ManxGP / Festival of speed on the Isle of Man
the last one is the chassis in its jig
This is the XR69 we campaigned in 2019 in the classic superbike race at the ManxGP / Festival of speed on the Isle of Man
the last one is the chassis in its jig
Last edited by Involute; 10-06-2025 at 17:44.
Very impressive!
Turning the chassis 3d cad model into metal…..
Bronze welded using a gas fluxer.
bead blasting to remove the flux residue
boring the steering head in the mill
3 frames after powder coat
below coping the tubes ready for the steering head
Last edited by Involute; 11-06-2025 at 18:35.
The petrol tank on bikes makes or breaks the look, the first one was done free hand ie, without the use of a buck, then to get better consistency we made a buck, but I forgot to photograph it, but a did do of a later one both pictured here.
free hand one.
bottom image is the centre of the buck, second from bottom tank side is made from one piece, and is for a super twin at the TT
Last edited by Involute; 12-06-2025 at 20:53.
Swinging arm, main spars extruded box section, the rest is made from flats folded and welded together to form box sections, the rest is water jet cut plate, axle boxes incorporating quick releases for TT pit stop tyre changes.
below same quick change on a Kawasaki swingarm
Last edited by Involute; 12-06-2025 at 14:52.
Should I continue with images of the Centre Hub Steering bikes development?
Yes please! One day, when I'm in Tunbridge Wells, I might drop in for a cuppa! This work is so beyond anything I've done I'd love to see more!
Your welcome to, the bikes are still here, but they don’t get used now sadly, and I don’t have CNC equipment here, just, a lathe, Tig, Mig, etc etc, but for my current project CNC wouldn’t suit, it’s mostly hand work.
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