i pulled the carb off and cleaned the jets again... and after a few big tugs she started
and this time ran considerably better !!
i think my initial clean helped but obviously didnt do a complete job..
however although it was running better it wouldnt accelerate and appeared to be overchoked. as a test i removed the air filter cover and it immediately increased speed, so now it appears a new airfilter is needed, although before i do that i'll check that i haven't disturbed the choke cable in case i have caused it to fully open after all the latest manhandling of the choke mechanism whilst removing the carb'... that's for tomorrow
