Suzuki GSF1250 Service Manual

Fuel System: 1G-2
General Description
Fuel System Description
B718H11701002
Fuel System
The fuel delivery system consists of the fuel tank (1), fuel pump (2), fuel 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 injected 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 “C”: Relieved fuel
4. Fuel feed hose 8. Fuel injector

Suzuki GSF1250 Specifications

General

Displacement	1255 cc
Bore x Stroke	79.0 mm x 64.0 mm
Compression Ratio	10.5:1
Fuel System	Fuel injection
Transmission	6-speed, constant mesh
Front Suspension	Telescopic, coil spring, oil damped
Rear Suspension	Link type, coil spring, oil damped
Front Brakes	Dual hydraulic disc
Rear Brakes	Single hydraulic disc
Front Tire	120/70ZR17M/C (58W), tubeless
Rear Tire	180/55ZR17M/C (73W), tubeless
Overall Length	2130 mm
Overall Width	790 mm
Seat Height	805 mm
Wheelbase	1485 mm
Fuel Tank Capacity	19.0 L
Starter	Electric
Final Drive	Chain
Ignition	Electronic ignition (transistorized)
Engine Type	4-stroke, liquid-cooled, DOHC
Ground Clearance	135 mm