Suzuki GSF1250 Service Manual

1A-29 Engine General Information and Diagnosis:
C13 for IAP sensor No.1 (Use of mode select switch)
Step Action Yes No
1 1) Turn the ignition switch OFF.
2) Lift and support the fuel tank. Refer to “Fuel Tank
Removal and Installation in Section 1G (Page 1G-9)”.
3) Check the IAP sensor coupler for loose or poor contacts.
If OK, then measure the IAP sensor (No.1) input voltage.
4) Disconnect the IAP sensor (No.1) coupler.
5) Turn the ignition switch ON.
6) Measure the voltage at the B wire and ground.
If OK, then measure the voltage at the B wire and B/Br
wire.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Voltage ( )
IAP sensor (No.1) input voltage
4.5 – 5.5 V
((+) terminal: B – (–) terminal: Ground, (+) terminal: B
– (–) terminal: B/Br)
Is the voltage OK?
Go to Step 4. • Loose or poor
contacts on the ECM
coupler.
• Open or short circuit
in the B wire or B/Br
wire.
I718H1110257-01
(A)
I718H1110258-01

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