Inlet Manifold & Throttle Body - Royal Enfield Classic 500 2009 Service Manual

Inlet Manifold & Throttle Body
The inlet manifold has the fuel injector located on top portion and the throttle body attach
to it.
The throttle body has a butterfly valve attached which is operated by the throttle cables
attached to a small drum on the right side.
A manual Bi starter is located on the left side and is operated with spring and plunger type
arrangement.
An idle air bypass screw is provided on the throttle body. It is the large brass coloured
screw that is accessed from the top of the throttle body. The clamps on the throttle body
may be loosened and the throttle body rotated outwards from the top to access the screw
without removing the fuel tank and to adjust the idle speed with the bike running. Turn
the screw CLOCKWISE (in) to DECREASE the idle speed. Turn the screw ANTICLOCKWISE
(out) to increase the idle speed. Remember that this is an AIR BYPASS screw – not a
throttle stop screw. Turning the screw about ¼ turn will result in an approximate 200 RPM
change in the idle speed. DO NOT adjust the throttle stop screw on the side of the throttle
body unless you are using the factory supplied software to recalibrate the base throttle
opening.
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