2001 Polaris Pro X 440 Owners Manual - Page 2

Carburetor Jetting AMBIENT TEMPERATURE Below -20°F Below -29°C 0-900 (0 3000) (0-3000) -20°F to +10° -29°C to -12°C +10°F +40°F -12°C +5°C Above +40°F Above +5°C Clutching Chart Altitude Meters (Feet) 0-900 0-3000 Shift Weight Drive Clutch Spring Driven Clutch Spring Driven Helix Chaincase Gearing 390 370 340 320 S53H Almond Red Almond Red Almond Red Almond Red Altitude Meters (Feet) #2 Blue / Orange #3 Blue / Orange #3 Blue / Orange #3 Blue / Orange R49 22:43 74P 22:43 74P 22:43 74P 22:43 74P 900-1800 (3000-6000) 350 330 310 290 900-1800 (3000-6000) S51H R49 1800-2700 (6000-9000) 320 300 280 260 1800-2700 (6000-9000) S49H R49 2700-3700 (9000-12000) 280 270 250 230 2700-3700 (9000-12000) S49H R49 #3 jet needle position for all Production = 350 main jet for 0_F at 0-1000 feet with 92 octane non-ethanol fuel, the key switch in the 92 octane position, and the timing curve position "D". This engine is jetted for operation at 0 degrees and warmer. Re-jetting is required for temperatures colder than 0_ F. TIMING INFORMATION The PRO X 440 has been equipped with two switches that will change the timing curve. The first switch is an ignition switch located on the console. This switch is used to match the timing curve to the type of fuel you are using. The fuel types are 92 octane non-ethanol premium fuel and 110 octane fuel. Do not run the machine in the wrong ingnition key position or engine damage will occur. CAUTION CAUTION Mis-use of the timing selector switch can cause serious engine damage. Running the machine in the wrong ignition key position will cause engine damage. Ignition Switch Positions OFF ON 110 OCT. ON 92 OCT. The second switch is located on the airbox and has seven optional curves. These seven options are used to match the fuel type and the racing conditions which may vary, depending on the race. The standard position is "D" and should not be moved unless you are a knowledgeable engine tuner. Position A B C D (Standard Position) E F G Timing Effect +3 +2 +1 0 --2 --3 --4 The exhaust system has a temperature sensor in the body of the pipe that effects the timing curve as the temperature changes. This feature helps the pipe tune quickly and is not adjustable.