You wont need to take switch off, just open up the bullet terminals, about 3 wires are push fitted together just below switch on the otside of fan housing. IIRC one goes into the ack of switch, one goes into the magneto/coil, the other goes to the low oil swich (screwed in side of aluminium caseing bwlow and to right of on/off switch).
Just fit another single wire into that bunch/joint run it to a terminal on a remote switch (any 2 terminal on/off switch will do.) Wire the other terminal on remote switch to any earth point on the engine.
When switch is open circuit the engine will run, when it's closed circuit the engine will stop or won,t start.
OR bringing a bacon butty with you should sort it!