2002-2006 Yamaha SX Viper 700 Series Snowmobile Service Manual, Page 69Get this manual

2002-2006 Yamaha SX Viper 700 Series Snowmobile Service Manual, Page 69

HIGH ALTITUDE TUNING HIGH ALTITUDE TUNING INSP ADJ To attain the best performance in high altitude conditions, carefully
chart Test the main jet (performanceplug color) OK Adjust the size of the main jet Re-test OK Test the low speed setting
Not OK Check to see if the gearing is too high or low Try high altitude settings Decide if the problem is with the pilot