Well Peter this has been an adventure and a learning opportunity for me.
I was familiar with 3-wire Hall effect sensors (we use them on the SCTA roadster) and 2-wire ABS sensors (inductive reluctance) but not 2-wire Hall effect sensors. So after research, like the 3-wire sensors, the 2-wire sensors produce a square wave...but it's current (6,17 ma) not voltage (0,5 v).
So Step 1 rather than physically moving the sensors just create a buffer circuit to copy the rear wheel square wave to the front wheel.
Then there's the ECM thing. Except it isn't the ECM it's the TCM. Using a 2018 FE-S as baseline here's what I found:
79T and 89T ECM: same p/n
79T and 89T VCM: same p/n
79T and 89T Console: same p/n
79T TCM 420666756 89T TCM 420266879
So what are the TCM differences. Obviously various coefficients must change. Perhaps they are hard-wired (ie resistors) rather than firmware.
So has Jase at Rotax tried swapping TCMs?
PS I'm looking for an F3-S TCM on eBay right now and if I find one I'm going to buy it (they are the same 2015=>2022).
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