Thump TSK50cc, Руководство пользователя

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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 differs from that at which this engine was certified, for
extended periods of time, may increase emissions.
High altitude performance can be improved by specific modifications 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
modification. This engine, when operated at high altitude with the
carburetor modifications for high altitude use, will meet each emission
standard throughout its useful life.
Even with carburetor modification, engine horsepower will decrease
about 3.5% for each 1,000-foot (300-meter) increase in altitude. The effect
of altitude on horsepower will be greater than this if no carburetor
modification is made.