High altitude operation
At high altitude, the standard carburetor
High altitude performance can be improved by specific modifica- tions to the carburetor. If you always operate the engine at altitudes higher than 1,500 m (5,000 feet) above sea level, have your authorized Honda dealer perform these carburetor modifi- cations.
Even with suitable carburetor jetting, engine horsepower will decrease approximately 3.5% for each 300 m (1,000 feet) increase in altitude. The effect of altitude on the horsepower will be greater than this if no carburetor modification is made.
Operation of the engine at an altitude lower than the carburetor is jetted for may result in reduced performance, overheating, and serious engine damage caused by an excessively lean air/fuel mixture.
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