ones like this ?

http://cgi.ebay.co.uk/Lanyard-Cut-Out-K ... _500wt_922

bike cuts out straight away before you get up

would another alternative be a std switch on both sides ?

knackeredMk1 wrote:The problem with the MX style kill switches is that you have to hold them on. When you fall off and the motor is still running you find that you want to kill the motor and then get on with whatever needs doing quickly rather than wait for the engine to stop turning before you do anything.

And, they just don't work when the revs are at full chat.
Mike

[quote="fallenmikethebike"][quote="knackeredMk1"]The problem with the MX style kill switches is that you have to hold them on. When you fall off and the motor is still running you find that you want to kill the motor and then get on with whatever needs doing quickly rather than wait for the engine to stop turning before you do anything.[/quote]
And, they just don't work when the revs are at full chat.
Mike[/quote]

I found this to be the case with the standard rocker switch and the ignition switch also.
In an attempt to cure my richness I turned the air screw up. Fine for a short while but then the engine ran away and neither switch would shut it off. All I could do to stop the engine was to stall it.
This was a while ago, and sorted now.

The bike has gone into diesel mode, using fumes from the crankcase as fuel, and red hot carbon deposits as the ignition method, there is probably an air leak as well.
Mike