When I first got 'Jetpac', the previous owner had wired the indicator switch under your right thigh in as a cruise control, that locked the motor on.
Firstly you had to be careful you did not overheat the motor, and it came straight out when I accidently caught it once with my leg at a junction and nearly got shot out into the traffic.
The only good thing was that both microswitches on the handlebars are wired for the motor so you can change hands if your thumb cramps up or you want to supplement the indicators with hand gestures (As per the the highway code of course!).
I have managed to resurrect the old indicators, which were basically hacked to bit husks and these work quite well now.