2003 Ski-Doo ZX Series Factory Shop Manual, Page 185Get this manual

Section 04 ENGINE Subsection 10 (CARBURETOR AND FUEL PUMP)
DPM Some Models
DPM (HO) Air intake 21 18 18

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives