Adjusting The Carburetor; Adjusting The Engine Idling Speed - Yamaha XT250N 2000 Owner's Manual

PERIODIC MAINTENANCE AND MINOR REPAIR
cC
8 Make sure that the air filter ele-
1
ment is properly seated in the
air filter case.
2 8 The engine should never be
operated without the air filter
element installed, otherwise
3
the piston(s) and/or cylinder(s)
may become
4
worn.
5
8. Install the air filter case cover by
installing the screws.
6
9. Install the panel.
7
8
9
EC000082

Adjusting the carburetor

The carburetor is an important part of
the engine and requires very sophisti-
cated adjustment. Therefore, most
carburetor adjustments should be left
to a Yamaha dealer, who has the
necessary professional knowledge
and experience.
described in the following section,
excessively
however, may be serviced by the
owner as part of routine mainte-
nance.
cC
The carburetor has been set and
extensively tested at the Yamaha
factory. Changing these settings
without sufficient technical knowl-
edge may result in poor perfor-
mance of or damage to the engine.
EAU00629
Adjusting the engine idling
speed
The engine idling speed must be
checked and, if necessary, adjusted
as follows at the intervals specified in
the periodic maintenance and lubrica-
tion chart.
The adjustment
NOTE:
A diagnostic tachometer is needed to
make this adjustment.
EC000094
NOTE:
The engine is warm when it quickly
responds to the throttle.
6-13
1. Attach the tachometer to the
spark plug lead.
2. Start the engine and warm it up
for several minutes
1,000–2,000 r/min while occa-
sionally revving it to 4,000–5,000
r/min.
EAU01168
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