Not sure if it's just the way it reads Steve, but to clarify:
The switch MAKES when the plunger is OUT (lever towards the bar) - when the lever is in resting /relaxed position then the plunger is pushed IN and the switch is OPEN in that state
i.e. it's opposite to many switch types in that it is Push-to-break rather than push-to-make.
If you unplug the switch from the perch (and it looks like below) then the switch is closed in this state and bike will start without doing anything; (this is state switch is in with lever pulled)
conversely, press the plunger pin and it will disable the starter. (this is state switch is in with lever relaxed)
Now - although the perch on the R3 is slightly different, the switch is the same as on other models;
what I have found with after-market adjustable levers, where there is less lever travel because of shorter span when lever adjusted to be closer to the bar (short fingers!), the plunger may not open up far enough to make the circuit
- you can usually test this by opening the adjustment to the widest setting (lever furthest from the bar) and see if works like that, but does not as you adjust it closer to the bar
If the above description fits what is happening, the simple fix is just to trim a few mm off the end of the pin; that means the pin will fully extend with a much shorter level travel away from the resting position