The ProStar 900 powered Polaris RZR XP900 has become the benchmark of high performance UTV's. Outselling all other competitive models combined, the RZR and especially xp900 model has proven to be very impressive, even in completely stock form. We have put thousands of miles on our RZR's and enjoyed every last one of them. Under typical conditions and use, the XP900 has proven very used friendly, with very little maintenance required. Changing the oil, and keeping a clean air filter in it are the most important. The XP900 air filter is a paper unit that does a good job of keeping dirt out, but can clog up quickly when conditions are dusty, or sandy. The stock paper air filter is not serviceable, once it is dirty, you must replace it with a new one or risk damaging your expensive engine.
In Motorsports, increased airflow leads to increased HP, Torque, and acceleration. The trick is to flow it safely, this is something K&N claims to have perfected with their oiled, high flow layered cotton gauze air filters. Their claim is to have the optimal blend of higher airflow, filtration efficiency, and durability and dust capacity. The multi layered cotton gauze in-between two sheets of aluminum wire mesh uses a sticky oil to increase filtration, capturing even the smallest dust particles. The dust and oil is easily cleaned from the K&N filter with a Recharger Kit and when cared for properly, will outlast any vehicle. The K&N filter for the Polaris XP900 is designed as a serviceable, yet simple, drop-in replacement for the more restrictive, disposable stock paper filter. The K&N part# PL-9011 uses 1.25" deep pleats for the most possible surface area extending service intervals.
A clean air filter leads longer engine life, and more airflow increases HP. We installed the stock replacement K&N ($72) in our first loaner XP 900, back in 2011, we have since moved the same filter on to the next years Jagged X version. The K&N fits well; providing a good seal at the edges, and it's oiled gauze media has always kept our intake/engine clean. In sand or extreme silt the K&N seems to need service a little quicker than a stock paper filter, but regardless of how dirty the exposed side is, the engine side and intake tube have always remained spotless. Unless you live next door to a Polaris dealership, servicing a K&N filter is going to be more convenient than having to go purchase a new stock one every time yours gets dirty. At $37 bucks a piece for a non-serviceable stock filter, the $72 K&N will start to pay for itself after two cleanings. A K&N Recharger Kit includes enough K&N filter cleaner/degreaser and K&N Oil to service the XP900 filter about 5 times for $14. To order, check out www.knfilters.com.