2002 Yamaha Motorsports Beartracker Owners Manual - Page 122

2002 Yamaha Motorsports Beartracker Manual

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EBU00296 EBU00301 Carburetor adjustment The carburetor is a vital part of the engine and requires very sophisticated adjustment. Most adjusting should be left to a Yamaha dealer who has the professional knowledge and experience to do so. However, the idling speed may be performed by the owner as a part of the usual maintenance routine. Idle speed adjustment NOTE: A diagnostic tachometer must be used for this procedure. 1. Start the engine and warm it up for a few minutes at approximately 1,000 to 2,000 r/min. Occasionally rev the engine to 4,000 to 5,000 r/min. The engine is warm when it quickly responds to the throttle. 2. Connect the tachometer and set the idle to the specified idling speed by adjusting the throttle stop screw. Turn the screw in to increase engine speed, and out to decrease engine speed. Specified idle speed: 1,400 ~ 1,500 r/min CAUTION: The carburetor was set at the Yamaha factory after many tests. If the settings are disturbed by someone without sufficient technical knowledge, poor engine performance and damage may result. 8-15

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8-15
EBU00296
Carburetor adjustment
The carburetor is a vital part of the engine and
requires very sophisticated adjustment. Most
adjusting should be left to a Yamaha dealer
who has the professional knowledge and ex-
perience to do so. However, the idling speed
may be performed by the owner as a part of
the usual maintenance routine.
CAUTION:
The carburetor was set at the Yamaha fac-
tory after many tests. If the settings are
disturbed by someone without sufficient
technical knowledge, poor engine perfor-
mance and damage may result.
EBU00301
Idle speed adjustment
NOTE:
A diagnostic tachometer must be used for this
procedure.
1.
Start the engine and warm it up for a few
minutes at approximately 1,000 to 2,000
r/min. Occasionally rev the engine to
4,000 to 5,000 r/min. The engine is warm
when it quickly responds to the throttle.
2.
Connect the tachometer and set the idle
to the specified idling speed by adjusting
the throttle stop screw. Turn the screw in
to increase engine speed, and out to de-
crease engine speed.
Specified idle speed:
1,400 ~ 1,500 r/min