Typically that is the way to get a tacho signal from a Diesel engine. But I thought the v-belt has slippage and wear, so it may not be precise. Well, to be honest, it is precise enough, did I mention "over the top" already?
Modifying the instrument panel is actually not that difficult. I scanned in the original front panel and made a design placing the new instruments, which are 12V instruments for cars bought on Aliexpress, I only used the inside.
Then I got the design printed professionally as an overlay, made a new front panel using the old as a template and glued the overlay on. The needles are from Aliexpress for "scooters" and they are very close to the Kubota originals.
I have PCBs at the back (for some extra functions) but you can run wires as easily.
I did not modify any of the plastics enclosure, so everything can be brought back to original. The extra cables required can go out through the hole under the hour counter.
I have not decided about the lamps (that I doubled up) if I leave the Kubota G1900 style with white print and coloured background or the symbol lighting up coloured, I think the latter is almost better when lighting.
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