well a bit more work done to the bike and i think its near ready..... Let it run for a good while (20 od minuites) after the last post (sat on it to keep it from cutting out) and after a while it settled down and stopped cutting out. think it may have just been to do with the fact it hadnt been run properly in a while and had previously been run dry. will keep an eye on it though.
Brakes in and bled to satisfaction
only thing thats an obvious failure now is that the brakes light switch on the new master cylinder does not seem to operate and obviously its a different switch to the standard one. going to get the multimeter on it and see for sure but hopefully can resolve that and book its mot this week

it passes