[alantf]

Many, many years ago, when I first started riding, bikes weren't fitted with indicators. You had to take your hand off the throttle, & stick your arm out, to signal your turns. So what happened? The throttle closed? No - bikes were fitted with a liitle screw on the throttle, to adjust the friction & keep them open. This meant that every movement of the throttle had to be done manually. We never had problems with this. I think that it's just a matter of remembering that you've made a D.I.Y. throttle lock.

Incidentally, other things we never had were :-
Multivalve engines
5 speed gearboxes
electric starters
Brake light switches on the front brake
Engine cutouts on the side stand
Disc brakes
Mirrors
Neutral indicators
Automatic petcocks
Plus a few other things that I can't remember, but that we didn't know were "missing" in those days. We didn't really have very good wet weather gear either, so come on guys, a throttle that must be manually closed can't be such a big deal, can it?