Was originally planning to convert a spare (velocette) 120mph speedo to a tach, but have dug deep and outlayed much $$$ for a genuine RC1303/03 tach
now dummying up my instruments, I notice my speedo has slightly smaller diameter mounting studs on the back (as no doubt out of a nacelle model) as well as the bezel with the flat back edge.
It also has the trip meter pin coming out the base, whereas my handlebar mounted speedo on my ZB33 has the trip meter coming out of the circular radius edge towards the rider.
Can anyone confirm if the speedo's used on twin clock machines have a case with heavier base studs and a different trip meter location?