2004 Skidoo ZX Series Service Manual, Page 541Get this manual
Section 13 TECHNICAL DATA Subsection 02 (ENGINES)
MX 550 and Legend GT 550 F
Country Engine Type FUEL SYSTEM
Carburetor type Main jet Needle jet Pilot jet Needle identification clip position Slide cut-away Float adjustment Air or pilot screw adjustment Idle speed Gas type Pump octane number Gasoil ratio 116 turn 200 RPM mm (in) PTOMAG PTOMAG PTOMAG
MX 550 EUROPE 552
Legend Grand Touring 550 EUROPE
VM34591 250250 P-8 (159) 40 6BCY40 2.5 23.90 (.941 .040) N.A1650 Unleaded 87 (R+M)2 or higher Injection