Suzuki GSF650S User Manual

3-42 ENGINE
Measure the piston pin outside diameter at three positions using
the micrometer. If any of the measurements are out of specifica-
tion, replace the piston pin.
) 09900-20205: Micrometer (0 – 25 mm)
( Piston pin O.D.
Service Limit: 17.980 mm
PISTON RING INSTALLATION
• Install the oil ring first, then the 2nd ring and finally the 1st
ring.
NOTE:
The 1st

1 and 2nd piston rings

2 differ in shape.
• The 1st

1 and 2nd

2 piston rings should be installed with the
mark facing up.
• First, install a spacer

3 into the oil ring groove and then install
the two side rails

4. The spacer and side rails do not have a
designated top and bottom. They can be installed in any posi-
tion.
$
INCORRECT
CORRECT
When installing the spacer, be careful not to allow its
two ends to overlap in the groove.
A
B
A
B

Suzuki GSF650S Specifications

General

Engine Type	4-stroke, 4-cylinder, liquid-cooled, DOHC
Bore x Stroke	65.5 mm x 48.7 mm
Compression Ratio	11.5:1
Fuel System	Fuel injection
Ignition	Electronic ignition (transistorized)
Transmission	6-speed constant mesh
Final Drive	Chain
Front Suspension	Telescopic, coil spring, oil damped
Rear Suspension	Link type, coil spring, oil damped
Displacement	656 cm³
Front Brakes	Disc
Rear Brakes	Disc
Front Tire	120/70ZR17
Rear Tire	160/60ZR17
Fuel Tank Capacity	19 liters
Seat Height	790 mm