
Project started
October 2023,
To make room for the 170 mm wide rear
tire the chain and transmission needed to move to the left 8.5
mm, so I measured the stock transmission plate and drew a new
one with 8.5 mm offset in CAD. I dimensioned everything from
one of the corners (O,O) and put all the X and Y coordinates
on the drawing so we would be able to machine it on the manual
Bridgeport using the DRO (Digital Readout) We started with a
steel plate that was sawed off about 40 mm longer than needed.
(for clamping purposes) |


Aad removed some material with the bandsaw
to save machining time, and we added 2 extra holes in the steel
strip so we would be able to use those to bolt it to the T-slots
in the Bridgeport. When the holes, slots and long sides of the
plate were machined Aad sawed off the short sides that had been
used for clamping, and machined the short sides in a fixed jaw
vise |


After a bit of sanding, and filing we had
the final shape. The 2 front mounting holes were tapped, top
and bottom were sanded to get rid of the mill scale and all
the edges chamfered with one of those super handy chamfering
tools that sounds like the dentist from hell! |




In the next episode we will be
replacing the mainshaft of the transmission with a shorter one
so the bike stays as narrow as possible. Did I mention it will
have a Cannonball electric start also?
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