G'day,
I removed the rocker covers on both cylinders, checked the rockers for cracks, checked to see if there were bent or damaged push rods(all good). Then checked tappet gap both sets were in spec. I had couple of spare Nikki carbies so I swap over the internals and it still hunted but it ran better, then I had a thought I have had a Briggs V twin in for repairs a while ago it wasn't running right a bit like this one. So I removed the "sump" and found the " paddle" had come off the govenor shaft, replaced it new new governor shaft and it fixed the problem. But i think I will get a new carby first before I pull the engine out and strip it down.
