Thanks Ted, you're a star, Merci from France!
Sprayed loads of brake cleaner while opening and closing the throttle on the sliders and cams then reinstalled the rubber covers, started sticking slightly so cleaned the interior of the rubbers.....now all good
I'll try and get the bike started before leaving for Blighty......if the carbs require a full strip, clean and fettling, who would be the best person to contact?