Suzuki GSF1250 Service Manual

1D-40 Engine Mechanical:
Cam Chain Tensioner Inspection
B718H11406015
Inspect the cam chain tensioner in the following
procedures:
1) Separate the crankcases, upper and lower. Refer to
“Engine Bottom Side Disassembly (Page 1D-53)”.
2) Remove the crankshaft assembly from the upper
crankcase. Refer to “Engine Bottom Side
Disassembly (Page 1D-53)”.
3) Remove the dampers (1) of the cam chain tensioner.
4) Remove the cam chain tensioner (2) and pin.
5) Check the contacting surface of the cam chain
tensioner. If it is worn or damaged, replace it with a
new one.
6) Install the pin, cam chain tensioner and dampers.
7) Reinstall the crankshaft assembly. Refer to “Engine
Bottom Side Assembly (Page 1D-61)”.
8) Reassemble the crankcases, upper and lower. Refer
to “Engine Bottom Side Assembly (Page 1D-61)”.
Cylinder Head Disassembly and Assembly
B718H11406016
Refer to “Engine Top Side Disassembly (Page 1D-24)”.
Refer to “Engine Top Side Assembly (Page 1D-28)”.
CAUTION
!
Identify the position of each removed part.
Organize the parts in their respective groups
(i.e., intake, exhaust, No.1 or No.2) so that
they can be installed in their original
locations.
Disassembly
1) Remove the tappet (1) and shim (2) by fingers or
magnetic hand.
2) Using the special tools, compress the valve spring
and remove the two cotter halves (3) from the valve
stem.
CAUTION
!
Be careful not to damage of the tappet sliding
surface with the special tool.
Special tool
(A): 09916–14510 (Valve spring
compressor)
(B): 09916–14521 (Valve spring compressor
attachment)
: 09916–84511 (Tweezers)
1
2
I718H1140096-01
I718H1140097-01
1
2
I718H1140098-01
(B)
(A)
3
I718H1140100-01

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