2004 Polaris Sportsman 400 Owners Manual - Page 54

Break-In Period OPERATION The break-in period for your new Polaris ATV is defined as the first ten hours of operation, or the time it takes to use the first two full tanks of gasoline. No single action on your part is as important as following the procedures for a proper break-in. Careful treatment of a new engine will result in more efficient performance and longer life for the engine. Perform the following procedures carefully. CAUTION Excessive heat build-up during the first three hours of operation will damage close-fitted engine parts. Do not operate at full throttle or high speeds for extended periods during the first three hours of use. Mixing brands or using a non-recommended oil may cause serious engine damage. We recommend the use of Polaris Premium 4 synthetic Oil or another 0W-40 API certified SH oil. Never substitute or mix oil brands. CAUTION 1. Fill the fuel tank with gasoline. See page 42. 2. Check the oil reservoir level on the dipstick. See page 77. Add oil if necessary to maintain the level between the safe and add marks. 3. Drive slowly at first. Select an open area that allows room to familiarize yourself with vehicle operation and handling. 4. Vary the throttle positions. Do not operate at sustained idle. 5. Perform regular checks on fluid levels, controls and areas outlined on the daily pre-ride inspection checklist. See page 52. 6. Pull only light loads. 7. During the break-in period, change both the oil and the filter at 20 hours or 200 miles. 51