Kawasaki FH721V govenor hunting

Newbie to this forum....hope you guys can help me
 
I have a 2005 Ferris 1500 with Kawasaki FH 721 V with about 425 hours.
 
The govenor is "loping/hunting" at idle; runs fine under load at operating RPM. To date I have:

• Replaced fuel filter. Good fuel flow at discharge side of fuel pump
• Adjusted valves
• Removed fuel cap with no results
• New coils (corrected a low power issue) and plugs
• Removed air filter; no results
• Took carb apart; ran fishing line thru passages. All seemed clear when carb cleaner was used
• Sometimes unit smells rich
• Is somewhat corrected if choke is applied...leads me to believe fuel problem

I haven't tried to adjust governor yet....not sure how on the Kawasaki
 
What am I missing?
 
I appreciate your help!

I have been told by a few repair people that it may not be possible to clean all passages of a carburetor, especially the cross drilled passages. This gunk left by ethanol fuels is especially hard to remove.  I would try to clean carb one more time by soaking it in a water-based cleaner before using regular spray carb cleaner to finish it with. The gel deposits that you are trying to remove must then be dissolved and flushed out with air. If this fails to improve your problem than a new carburetor maybe the only answer. I will assumed you have checked for vacuum leaks at intake gaskets and found none. Your symptoms represent a lean mixture (ie choke makes it better) so fuel starvation or intake leaks are the two best answers for your problem.

I am not sure if they are threaded or pressed in. If threaded... there should be notches in jet for a flat screwdriver to use for unscrewing the jets (threadlock may have been used and makes it near impossible to unscrew). I always tighten screws/jets before loosening as it sometimes breaks free and then loosens.  I would not force the issue if they do not loosen easily. Leave them in and hope water based cleaner dissolves gunk in passages. Flush with air and carb spray when done soaking.
 
This is where a new carb may be needed as cleaning of the carb cannot always be accomplished. The amount of time and effort to repair a carb sometimes outweighs the cost of a new carb, although I hate to give in to such a fate.