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Carburetor Adjustments & Tuning Tips
HIGH ALTITUDE CARBURETOR ADJUSTMENT
At high altitude, the standard carburetor airfuel mixture will be too rich.
Performance will decrease, and fuel consumption will increase. A very rich
mixture will also foul the spark plug and cause hard starting. Operation
at an altitude that diers from that at which this engine was certied, for
extended periods of time, may increase emissions.
High altitude performance can be improved by specic modications to
the carburetor. If you always operate your engine at altitudes above 6,500
feet (2,000 meters), have your servicing dealer perform this carburetor
modication. is engine, when operated at high altitude with the
carburetor modications for high altitude use, will meet each emission
standard throughout its useful life.
Even with carburetor modication, engine horsepower will decrease
about 3.5% for each 1,000-foot (300-meter) increase in altitude. e eect
of altitude on horsepower will be greater than this if no carburetor
modication is made.
Adjustable Air Fuel/Pilot Screw
Use to adjust air fuel mixture for your
bike
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