2003 Kawasaki 1100 STX D.I. Jet Ski Factory Service Manual, Page 22Get this manual
GENERAL INFORMATION 1-15 Technical InformationTheory of Direct Fuel Injection
47 Cylinder Heads Each head mounts one fuel injector and one spark plug per cylinderTheir positioning is designed to permit complete combustion and maximum power from each airfuel chargeThis results in greatly reduced exhaust emissions and increased fuel economy