I have still a problem with lower cylinder not getting hot, motor ticks over fine and will power up to 6000rpm after that it's flat and at max throttle wide open will only revs to 9000 rpm. lower cylinder dies and no smoke at exhaust and what gas there is at the exhaust is cold comparing with the other exhaust. have interchanged plugs,coils, pgm-11's and striped and checked over carbs,I have not yet check compression's as it feels quite good at the kick start with both the same , I am thinking it may be crank centre seal is leaking, just wondered if anyone has come across the same issue in the past?. any help would be appreciated.