Problem solved Hoooray!!!
Turned out to be a dodgy left hand carb . No idea what is wrong with it but solved with help
from members on here yet again ..
Ash sent me a set of carbs and the bike ran on both at last .
Good old Woodside then sent me a set he had spare and the bike is now up and running.
New tyres this week and a dry day and ride time. Cheers guys
Woodside wouldn't take payment so donation made to this great forum
Rich