2010 Polaris Sportsman 850 Service Manual, Page 336Get this manual
ELECTRICAL LIGHTS
Headlight Adjustment
The headlight beam is adjustable1Place the vehicle on level surface with the headlight approximately 25 ft(7.6 m) from wall25 ft(7.6 m)
Adjust the beam to desired position and tighten the screw
WARNING
Due to the nature of ATVs and where they are operated, headlight lenses become dirtyFrequent washing is necessary to maintain lighting qualityRiding with poor lighting can result in severe injury or death