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.

Partzilla's side-by-side expert John Talley offers a couple of general tips for rebuilding the top end of a Polaris Ranger 800 engine.

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

If your Polaris ATV is sputtering , you may have a fuel and air mixture problem on your hands.

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

Who builds a better UTV between Polaris and Yamaha? It's subjective, and everyone has their preference, including Partzilla's side-by-side expert John Talley. 

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.

Here's a guide to the basic components that make up the suspension A-arms on an ATV or side-by-side.