Ok, thanks for help - so this is what I've got.
Powervalve is ok, I set it exactly like it was given in service manual (Factory, not Clymer

)Setting carburetor is ALMOST ok (it's 90, main jet 350) but I wrote "almost" because today I've found that somebody did something weird to the floater - fuel level does not match specifications and due to this, the mixture is too rich. I'll correct this as soon as I can and get back to you guys!
PS. And yeah, This "warsaw" is a Capital of Poland, in Europe

And I'm the one and only owner of a Zilla in my Country...what a wonderful feeling
