Suzuki GSF1250 Service Manual

Engine Mechanical: 1D-47
Valve Guide Replacement
B718H11406018
1) Remove the cylinder head. Refer to “Engine Top
Side Disassembly (Page 1D-24)”.
2) Remove the valves. Refer to “Cylinder Head
Disassembly and Assembly (Page 1D-40)”.
3) Using the valve guide remover, drive the valve guide
out toward the intake or exhaust camshaft side.
Special tool
(A): 09916–43211 (Valve guide remover/
installer)
NOTE
• Discard the removed valve guide sub-
assemblies.
• Only oversized valve guides are available
as replacement parts. (Part No. 11115-
17E70)
4) Refinish the valve guide holes in the cylinder head
using the reamer and handle.
CAUTION
!
When refinishing or removing the reamer
from the valve guide hole, always turn it
clockwise.
Special tool
(B): 09916–34580 (Valve guide reamer (10.8
mm))
(C): 09916–34542 (Reamer handle)
5) Cool down the new valve guides in a freezer for
about one hour and heat the cylinder head to 100 –
150 °C (212 – 302 °F) with a hot plate.
CAUTION
!
Do not use a burner to heat the valve guide
hole to prevent cylinder head distortion.
6) Apply engine oil to each valve guide and valve guide
hole.
7) Drive the guide into the guide hole using the valve
guide installer.
CAUTION
!
Failure to oil the valve guide hole before
driving the new guide into place may result in
a damaged guide or head.
Special tool
(A): 09916–43211 (Valve guide remover/
installer)
(D): 09916–43230 (Attachment)
(A)
I718H1140125-01
(B)
(C)
I718H1140126-01
1. Cylinder head 2. 19.0 mm (0.75 in)
“a”
(A)
(D)
1
I718H1140127-01
(A)
(D)
I718H1140128-01

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