Suzuki GSF650 Service Manual

1D-46 Engine Mechanical:
CAUTION
!
• The valve seat contact area must be
inspected after each cut.
• Do not use lapping compound after the
final cut is made. The finished valve seat
should have a velvety smooth finish but
not a highly polished or shiny finish. This
will provide a soft surface for the final
seating of the valve which will occur
during the first few seconds of engine
operation.
NOTE
After servicing the valve seats, be sure to
check the valve clearance after the cylinder
head has been reinstalled. Refer to “Valve
Clearance Inspection and Adjustment in
Section 0B (Page 0B-6)”.
Cylinder Disassembly and Assembly
B817H21406031
Refer to “Engine Top Side Disassembly (Page 1D-24)”.
Refer to “Engine Top Side Assembly (Page 1D-26)”.
Disassembly
1) Remove the ECT sensor (1) and oil jet (for cam
chain tension adjuster) (2).
2) Remove the water inlet connector (3).
Assembly
Assembly is in the reverse order of disassembly. Pay
attention to the following points:
• Apply engine coolant to O-ring of water inlet
connector.
CAUTION
!
Replace the O-ring with a new one.
• Tighten the water inlet connector bolts to the specified
torque.
CAUTION
!
Make sure that the “up” mark “A” face up.
Tightening torque
Water inlet connector bolt (a): 10 N·m (1.0 kgf-m,
7.0 lbf-ft)
1
2
I717H1140114-01
3
I717H1140115-01
I717H1140116-01
“A”
(a)
(a)
I717H1140117-02

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