When you find put what causes this please post as it may help with issues me or others are having/im having a similar issue but mine runs fine but as soon as i pull on PTO in 14 seconds it will bog down to 2700rpm and stay that way for 8 seconds then ramp back up to full power for 14 seconds then bog down again for 8 seconds
sounds a lot like my issues, it is probably something very simple and over looked but I can't figure it out.they told me they put new plugs new coils, new fuel lines, said the carb is fine, adjusted the valves ,, and it still does it. Kawasaki FR 731v engine not even the dealer can figure it out