Duh! Look under our archives under engine noise. I knew it was
somewhere. Here is an excerpt.
Re: [KawasakiClassicandNomad] Re: Nomad Engine noise?
"Mine also makes those noises when cold. I read it was the ISC valves
(in the right "air cleaner"), so I quit worrying about them. This was
of course AFTER I replaced them thinking they were bad. :-((( "
Bruce