Polaris 2001 High-Performance Snowmobile Service Manual (PN 9916690), Page 162Get this manual
CARBURETION Adjustments
The amount of air drawn into the cylinders is influenced by such factors as altitude, temperature, humidity, etcSuppose the amount of air drawn into the cylinders at an elevation of zero is taken as 100 (the temperature and humidity in this case are considered constant)The amount of air in question decreases in proportion to rise in elevation as shown in Chart AReduction in the amount of air drawn into the cylinders changes the airfuel mixture ratio, resulting in marked drop in power outputChart 100 90 80
1000 1500 Altitude (m)
Chart shows the relationship between rise in temperature and the amount of air drawn into the cylindersIn this case, the atmospheric pressure (elevation) and the humidity are considered unchanged and the amount of air going into the cylinders at 32 (0 C) is taken as 100