Injection Timing - Suzuki GSX-R750 Service Manual

FI SYSTEM AND INTAKE AIR SYSTEM 4-15

INJECTION TIMING

The system employs a sequential, four-cylinder independent injection type, using the crankshaft position
sensor (signal generator) to determine the piston position (injection timing and ignition timing) and the cam-
shaft position sensor to identify the cylinder during operation, and these information are sent to the ECM. This
makes it possible to inject the optimum volume of fuel in the best timing for the engine operating conditions.
When the crankshaft begins to turn at the time of starting, the ECM sends the signals to the four injectors, #1,
#2, #3 and #4 to have them inject fuel simultaneously. From the second turn onward, the sequential four-
cylinder independent injection occurs as explained above.