Suzuki GSF1250 Service Manual page 36

0B-5 Maintenance and Lubrication:
Spark Plug Gap
1) Remove the spark plugs. Refer to "Ignition Coil /
Plug Cap and Spark Plug Removal and Installation in
Section 1H (Page 1H-4)".
2) Measure the spark plug gap using a thickness
gauge.
Adjust the spark plug gap if necessary.
Spark plug gap
0.7 – 0.8 mm (0.028 – 0.030 in)
(A)
3) After finishing the spark plug inspection, reinstall the
removed parts.
Electrodes Condition
1) Remove the spark plugs. Refer to "Ignition Coil /
Plug Cap and Spark Plug Removal and Installation in
Section 1H (Page 1H-4)".
2) Check to see the worn or burnt condition of the
electrodes.
If it is extremely worn or burnt, replace the plug. And
also replace the plug if it has a broken insulator, or
damaged thread.
3) After finishing the spark plug inspection, reinstall the
removed parts.
Valve Clearance Inspection and Adjustment
Inspect valve clearance
Initially every 24 000 km (14 500 miles, 48 months).
Inspection
Valve clearance adjustment must be checked and
adjusted, a) at the time of periodic inspection, b) when
the valve mechanism is serviced, and c) when the
camshafts are removed for servicing.
1) Remove the fuel tank. Refer to "Fuel Tank Removal
and Installation in Section 1G (Page 1G-9)".
2) Remove the frame head covers. (GSF1250/A) Refer
to "Exterior Parts Removal and Installation in Section
9D (Page 9D-6)".
3) Move the cowling by removing the screws.
(GSF1250S/SA)
4) Drain a small amount of engine coolant and remove
the thermostat connector. Refer to "Thermostat
Connector / Thermostat Removal and Installation in
Section 1F (Page 1F-9)".
5) Remove the ignition coil/caps (1) and spark plugs.
Refer to "Ignition Coil / Plug Cap and Spark Plug
Removal and Installation in Section 1H (Page 1H-
I649G1020011-04
4)".
6) Remove the PAIR control solenoid valve (2) and
reed valves (3). Refer to "PAIR Control Solenoid
Valve Removal and Installation in Section 1B
(Page 1B-6)" and "PAIR Reed Valve Removal and
Installation in Section 1B (Page 1B-6)".
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7) Remove the cylinder head cover. Refer to "Engine
Top Side Disassembly in Section 1D (Page 1D-24)".
NOTE
The valve clearance specification is different
for both intake and exhaust valves.
Valve clearance (When cold)
IN.: 0.10 – 0.20 mm (0.004 – 0.008 in)
EX.: 0.20 – 0.30 mm (0.008 – 0.012 in)
2
3
3
1
1
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