Thanks for this.
I checked with some WD40 squirted through where the pilot jets screw into and three jets emerged from all three holes in the carb body except for the last one which has only two sprays so one must have a blockage. I will get some carb cleaner and air in there this weekend. :-D

 

Good work... you'll get it done!

 

Thanks all, and well they seem clear now at last. I have some work to do putting them all back together and re-installing on the bike but think I have done a thorough job now. :-D
It's cold and miserable in the UK at the moment so I don't spend much time in the garage yet.

 

Keep us posted.

 

I definitely will! :-D