2004 Polaris Pro X Factory Service Manual, Page 6Get this manual
SPECIFICATIONS MODEL: 440 PRO XR MODEL NUMBER: S04NX4CS ENGINE MODEL: S2460- 4444- PR4C ENGINE Engine Type Engine Displacement cc Bore inmm Stroke inmm Cylinders PistonCylinder Clearance inmm Piston Ring End Gap inmm Piston Marking Piston Ring Marking Operating RPM 200 Idle RPM 200 Engagement RPM 300 Exhaust Valve Spring RedWhite Domestic 438 2.60"66mm 2.52"64mm .0045 .0053" .11 .13mm .012 .015" .3 .4mm 3021304 NA Type Main Jet Pilot Jet Jet Needle Needle Jet CARBURETION Mikuni TMX 34 290 40 6GL6761Q8
Throttle Gap UnderCutaway .1" inmm 2.5mm Cutaway Valve Seat Starter Jet Fuel Screw Pilot Air Jet Air Screw Fuel Octane AMBIENT TEMPERATURE 2.5 1.5 1.5 NA NA .75 Turns 110 Octane minimum
Altitude
0600 (02000) 6001200 (20004000) 12001800 (40006000) 18002400 (60008000) (6000 8000) 24003000 (800010000) (8000 10000) 30003700 (1000012000) (10000 12000)