Suzuki GSF1250 Service Manual

1C-4 Engine Electrical Devices:
STP Sensor Adjustment
B718H11306025
Adjust the STP sensor in the following procedures:
1) Remove the air cleaner cover and air cleaner
element. Refer to “Air Cleaner Element Removal and
Installation in Section 1D (Page 1D-6)”.
2) Disconnect the STVA lead wire coupler (1).
3) Insert the needle pointed probes to the STP sensor
coupler (between Y/W and B/Br wires).
4) Turn the ignition switch ON.
5) Close the secondary throttle valve by finger and
measure the STP sensor output voltage.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe
set)
Tester knob indication
Voltage ( )
STP sensor output voltage
ST valve is fully closed: Approx. 0.6 V ((+): Y/W –
(–): B/Br)
6) Loosen the STP sensor mounting screw adjust the
STP sensor (2) until the output voltage comes within
the specified value and tighten the STP sensor
mounting screw.
Special tool
: 09930–11950 (Torx wrench)
Tightening torque
STP sensor mounting screw: 3.5 N·m (0.35 kgf-
m, 2.5 lb-ft)
7) Reinstall the removed parts.
STP Sensor Removal and Installation
B718H11306026
Removal
1) Turn the ignition switch OFF.
2) Disconnect the coupler (1) and remove the STP
sensor (2) with the special tool.
NOTE
Prior to disassembly, mark each sensor’s
original position with a paint or scribe for
accurate reinstallation.
Special tool
: 09930–11950 (Torx wrench)
1
I718H1130002-01
I718H1130017-01
(A)
(B)
I718H1130016-02
2
I718H1130003-01
1
2
I718H1130004-01

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