Well after e few months delay (XS400 rebuild) I'm back on with my k100. Reading Jez's post regarding fuel pressure's he already had a picture of an item I was going to ask about. Its the switch on the right of throttle cable bracket and I think he was advised that it was only fitted to early K's (like mine) and could safely be binned without any effect. Could one of the more knowledgeable residents please advise me if that is the case and what its purpose was?

Sorry about the slightly blurry effect, forgot to switch macro on.

Thanks

Fent

It is to do with ignition but apparently was of little or no benefit and factory scrapped it with no ill effect and no change of part etc. They are best for using in a slingshot and firing it at the local cats. Don't forget to cap the vacuum takeoff on #1 throttle body.

Thanks RG, Im taking the TB's off for a clean up and the vacuum hose to this switch was perished. So aside from leaking air into what seems a reasonably running engine,  I guessed it wasn't doing much else.