Go to
www.kzzone.com/billet.html
and order their block off plates. Then remove all of the "Smog Gear"(vacuum lines,a rubber hose from the air box to the air valve control switch & other not needed lines).
It's a system designed to reduce emissions, called the Kawasaki clean air suction system(KCASS)that neither adds or reduces horsepower to the engine.
The factory shop manuals mention it, and how to maintain it.
