A few simple tips from Partzilla's ATV expert  for doing winter maintenance on a Polaris Sportsman.

If your Polaris ATV is burning oil and fouling up spark plugs quickly, take a peek in the airbox and do a leak down test.

What could be causing your Polaris Sportsman 850XP to overheat? Did you check the thermostat?

When a Polaris Sportsman revs up but doesn't move on acceleration, it might be time to inspect the drive belt. 

Got a Polaris ATV that's squeaking badly when it bounces up and down? John Talley says you might have to re-grease the zerk fittings.

What can high oil pressure damage on a Polaris ATV? John Talley weighs in on high oil pressure affecting a Polaris High Lifter engine.

Drive clutch or driven clutch? It can get confusing. John Talley answers a question about which clutch could be causing rev problems on a Polaris ATV.

An ATV with heavy dirt buildup in the airbox could need a new cylinder and piston rings. John Talley weighs in on what could be causing black soot buildup in a Polaris Sportsman airbox.

How do you bleed the brakes on a Polaris Sportsman? John Talley answers questions about bleeding Polaris ATV brakes.