Hi again, I seem to be going round in circles. I have re built the carbs,New needles and jets, sorted the floats and cleaned every thing up.The problem is I can't get the engine to run over at a reasonable tick over.With the stops backed right off it still seems to race, don't have a rev counter but it feels like about 1200 rpm. I slowed it down by retarding ignition but then I have starting and carb spiting back problems.I have advanced again a bit to sort that out but I can't get e reasonable tick over speed. O yes, sometimes it seems to hunt, speeds up a bit more and slows down a bit. What should I be looking at next? The only thing I haven't done is replaced the pistons, There is some wear but not sure how much that affects things. Help and advice appreciated.