Suzuki GSF650 Service Manual

1D-16 Engine Mechanical:
Inspection
Check following items for any defects or clogging.
Replace the throttle body if necessary.
•O-ring
• Throttle valve
• Secondary throttle valve
• Vacuum hose
ISC Valve Visual Inspection
Visually inspect the ISC valve if necessary.
Throttle Valve Synchronization
B817H21406013
Use of SDS Tool
Check and adjust the throttle valve synchronization
among four cylinders.
1) Lift and support the fuel tank. Refer to “Fuel Pump
Assembly / Fuel Level Gauge Removal and
Installation in Section 1G (Page 1G-11)”.
2) Disconnect the IAP sensor (#1) vacuum hoses (1)
from the throttle body.
3) Connect the respective vacuum tester hoses to each
vacuum nipple on the throttle body.
I717H1140030-01
1
1
I717H1140031-01
I717H1140033-01

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