Right guys and galls, got it all stripped down tonight to have a look (and put back together again in an hour and a half) and didnt really find anything substantial, the only idea i have is that the exhaust valves on cylinder 3 may be catching... here are some pics of scratches on the cams, dont think theres anything to worry about as they are on piston one (which had the original big end bearing poop itself)


this isnt as bad as it looks, the camera just caught the light right to show every tiny imperfection

and a few scratches on the 2nd inlet to cylinder one
If anyone has any suggestions please get in contact