8-7
ESS55402
CARBURETOR ADJUSTMENT
CAUTION:
•
Be sure this adjustment is serviced by a Yamaha
dealer.
•
Be sure the carburetor silencer is installed during
running to prevent engine damage.
Under some operating conditions the carburator setting
may have to be changed due to air temperature changes,
elevation changes, use of alcohol oxygenated fuels, etc.
and should be done by an authorized Yamaha dealer.
CAUTION:
The drive chain gears and V-belt clutch should be
adjusted when operating over 900 m (3000 ft) high
altitude. Consult a Yamaha dealer.
Pilot Screw Adjustment
Turn the pilot screw in or out to adjust low speed tuning.
Standard pilot screw position:
1.0 turn out from the seated position
804-056
Warm weather
High altitude
Cold weather
Low altitude
Pilot screw
Mixture
Condition
Turn in
Turn out
Leaner
Richer