A quick overview on greasing the zerk fittings, grease fitting or grease nipple on a Polaris Sportsman 570 sp atv. Found 6 grease fittings on back and 6 on front, one on prop shaft. Usually will help get rid of squeaks when riding and help the bushings hopefully last a bit longer with a smoother ride.
https://amzn.to/3YTTEEW Polaris All Season Grease
https://amzn.to/3YWKiZi Grease Gun Set