2005 Ski-Doo Racing Handbook, Page 9Get this manual
SECTION 022005 MODELS TECHNICAL DATA
MX 440 RACING
MODEL ENGINE Engine type Number of cylinders Bore Stroke Displacement Maximum power engine speed [1] Piston ring type New Wear Limit New Wear Limit New Wear Limit New Wear Limit mm (in) mm (in) cm3 (in3) 100 RPM 1st 2nd mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) PN 453 65.0 (2.56) 65.8 (2.59) 436.7 (26.6) 8400 Semi-trapezoidal 0.4 (.0157) 1.0 (.040) 0.04 (.0016) 0.2 (.0079) 0.10 0.016 (.00390.0006) 0.2 (.0079) 0.39 (.0154) 1.2 (.0472) 0.3 (.0118) 0.06 (.0024) 420 924 810 MX 440 Racing
Ring end gap
Ringpiston groove clearance
Pistoncylinder wall clearance
Connecting rod big end axial play Maximum crankshaft end-play [2] Maximum crankshaft deflection at PTO Reed Valve FUEL SYSTEM Carburetor type Main jet Needle jet Pilot jet Needle identification clip position Slide cut-away Float adjustment Air screw adjustment Idle speed RPM Gasoil ratio mixing oil