Suzuki GSF650 Service Manual

1G-2 Fuel System:
General Description
Fuel System Description
B817H21701001
Fuel System
The fuel delivery system consists of the fuel tank (1), fuel pump (2), fuel mesh filter (3), fuel feed hose (4), fuel delivery
pipe (5) (including fuel injectors) and fuel pressure regulator (6). There is no fuel return hose. The fuel in the fuel tank
(1) is pumped up by the fuel pump (2) and pressurized fuel flows into the injector (8) installed in the fuel delivery pipe
(5). Fuel pressure is regulated by the fuel pressure regulator (6). As the fuel pressure applied to the fuel injector (8)
(the fuel pressure in the fuel delivery pipe) is always kept at absolute fuel pressure of 300 kPa (3.0 kgf/cm
2
, 43 psi), the
fuel is injectored into the throttle body in conic dispersion when the injector (8) opens according to the injection signal
from the ECM.
The fuel relieved by the fuel pressure regulator (6) flows back to the fuel tank (1).
1
2
3
5
6
4
7
“A”
“B”
“C”
8
I718H1170001-02
1. Fuel tank 5. Fuel delivery pipe “A”: Before-pressurized fuel
2. Fuel pump 6. Fuel pressure regulator “B”: Pressurized fuel
3. Fuel mesh filter 7. Fuel filter (For high pressure) “C”: Relieved fuel
4. Fuel feed hose 8. Fuel injector

Suzuki GSF650 Specifications

General

Displacement	656 cc
Bore x Stroke	65.5 mm x 48.7 mm
Compression Ratio	11.5:1
Fuel System	Fuel injection
Ignition	Electronic ignition (transistorized)
Starter	Electric
Transmission	6-speed, constant mesh
Final Drive	Chain
Front Suspension	Telescopic, coil spring, oil damped
Rear Suspension	Link type, coil spring, oil damped
Front Tire	120/70ZR17M/C (58W), tubeless
Rear Tire	160/60ZR17M/C (69W), tubeless
Overall Length	2, 130 mm
Rear Brakes	Disc brake
Fuel Tank Capacity	19.0 L
Wheelbase	1, 470 mm
Seat Height	790 mm
Ground Clearance	135 mm
Engine Type	4-stroke, liquid-cooled, DOHC, 4-cylinder