Suzuki GSF650S User Manual

ELECTRICAL SYSTEM 6-21
The circuit consists of the turn signal/side-stand relay, neutral indicator light and switches. The ignition coils
will send voltage to the spark plugs dependant on what gear the transmission is in and whether the side-
stand is either up or down. The gear position and side-stand switches work together in this system.
The ignition coils work only in two situations as follows.
1. Transmission: Neutral (ON) Side-stand: Down (OFF)
The current flow

A switches “on” the side-stand relay and the ignition coils send voltage to the spark
plugs even when the side-stand is kept down.
2. Side-stand: Up (ON)
The current flow

B switches “on” the side-stand relay and the ignition coils send voltage to the spark
plugs. The engine can be started in any gear.
Battery
Ignition switch
“ON”
Turn signal /
side-stand relay
Gear position
switch “ON”
Side-stand switch
“DOWN POSITION”
Ignition coils
Side-stand relay “ON”
Battery
Ignition switch
“ON”
Turn signal /
side-stand relay
Gear position
switch “OFF”
Side-stand switch
“UP POSITION”
Ignition coils
Side-stand relay “ON”

Suzuki GSF650S Specifications

General

Engine Type	4-stroke, 4-cylinder, liquid-cooled, DOHC
Bore x Stroke	65.5 mm x 48.7 mm
Compression Ratio	11.5:1
Fuel System	Fuel injection
Ignition	Electronic ignition (transistorized)
Transmission	6-speed constant mesh
Final Drive	Chain
Front Suspension	Telescopic, coil spring, oil damped
Rear Suspension	Link type, coil spring, oil damped
Displacement	656 cm³
Front Brakes	Disc
Rear Brakes	Disc
Front Tire	120/70ZR17
Rear Tire	160/60ZR17
Fuel Tank Capacity	19 liters
Seat Height	790 mm