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Valve Clearance; Kawasaki Clean Air System - Kawasaki VN1700 Voyager Custom ABS 2010 Owner's Manual

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Valve Clearance

Valve and valve seat wear is auto-
matically compensated for the valve
clearance. So inspection and adjust-
ment of the valve clearance are not
necessary on this motorcycle.

Kawasaki Clean Air System

The Kawasaki Clean Air System
(KCA) is a secondary air suction sys-
tem that helps the exhaust gases to
burn more completely. When the spent
fuel charge is released into the exhaust
system, it is still hot enough to burn.
The KCA System allows extra air into
the exhaust system so that the spent
fuel charge can continue to burn. This
continued burning action tends to burn
up a great deal of the normally un-
burned gases, as well as changing a
significant portion of the carbon mon-
oxide into carbon dioxide.
Air Suction Valves -
The air suction valve is essentially a
check valve which allows fresh air to
flow only from the air cleaner into the
exhaust port. Any air that has passed
the air suction valve is prevented from
returning. Inspect the air suction valves


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