Adjusting The Carburetors; Adjusting The Engine Idling Speed - Yamaha TMAX XP500 Owner's Manual

PERIODIC MAINTENANCE AND MINOR REPAIR

Adjusting the carburetors

The carburetors are important parts
of the engine and require very
sophisticated adjustment. Therefore,
most carburetor adjustments should
be left to a Yamaha dealer, who has
the necessary professional knowl-
edge and experience. The adjust-
ment described in the following sec-
tion, however, may be serviced by
the owner as part of routine mainte-
nance.
cC
6
The carburetors have 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.
EAU00630
Adjusting the engine idling
Carburetors, adjusting
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 engine should be warm before
making this adjustment.
NOTE:
8 The engine is warm when it
quickly responds to the throttle.
EC000095
8 A diagnostic tachometer is need-
ed to make this adjustment.
1. Remove panel B. (See page 6-7
for panel removal and installation
procedures.)
2. Attach the tachometer to the
spark plug lead.
EAU04758
Engine idling speed
1. Throttle stop screw
6-21
b a
1
3. Check the engine idling speed
and, if necessary, adjust it to
specification by turning the throt-
tle stop screw. To increase the
engine idling speed, turn the
screw in direction
decrease the engine
speed, turn the screw in direction
b.
Engine idling speed:
1,150–1,200 r/min
a.
To
idling