1 you could put a fuel gauge in, but it would mighty expensive, (a) find a 1200 tank,with the gauge sender unit (b) Then find the gauge set, to suit.
My question in return would be why? Res position on the gas tap cuts in, on mine with 6 litres of fuel left 1/3 tank. When this happens its time to fill up, Res fuel tap where made to stop people from opening their tank and putting lit matches in them, to see how much fuel they had left
2 K-tric is a sender unit mounted on the throttle butterfly shaft, that sends throttle position info, back to the ignitor box.