All of us need to periodically check the adjustment/calibration of the oil pump on your sled. This is primarily due to the extremely sensitive nature of the pump calibration, as only millimeters make a huge difference in the amount of oil delivered. The pump calibration changes slowly over time due to the stretching of the braided steel cable on a cable-driven oil pump.
Generally, most every two-stroke sled (except the E-TEC Ski-Doo) should be (roughly) using about a quart of injection oil to 10 gallons of fuel (one quart per 10 gallons figures out to a 40:1 ratio). Stock sleds are less critical, and those with power-mods are more critical. Therefore, if you are not putting a quart of oil in each time you fill your sled up with fuel, you should be checking your oil pump setting.
On some of the new models the pump calibration or cable adjuster is more difficult to get at, but this is not an excuse not to adjust it. A number of the Polaris 600, 700 & 800 CFI sleds are set really lean and are using less oil than they really should be, so pay attention. When checked, the oil pump was often out of adjustment. It stands to reason this would result in premature wear on the engine.