Suzuki AN400 Service Manual page 31

Spark Plug Inspection and Cleaning
Inspect spark plug
Every 6 000 km (4 000 miles, 12 months)
Replace spark plug
Every 12 000 km (7 500 miles, 24 months)
Carbon Deposit
Check to see if there are carbon deposits on the plug. If
carbon is deposited, remove it using a spark plug
cleaner.
Heat range
Standard
NGK CR7E
DENSO U22ESR-N
Spark Plug Gap
Measure the plug gap with the thickness gauge. If the
gap is out of specification, adjust it to the following gap.
Special tool
: 09900–20803 (Thickness gauge)
Spark plug gap "a" (Standard)
0.7 – 0.8 mm (0.028 – 0.031 in)
Electrodes Condition
CAUTION
!
Confirm the thread size and reach when
replacing the plug. If the reach is too short,
carbon will be deposited on the screw
portion of the plug hole and engine damage
may result.
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, damaged thread.
Valve Clearance Inspection and Adjustment
B705H10206004
Inspect valve clearance
Every 24 000 km (14 500 miles, 48 months)
Inspection
The valve clearance specification is different for intake
and exhaust valves. Valve clearance 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 air cleaner box. Refer to "Air Cleaner
Cold type
CR8E
2) Dismount the throttle body.
U24ESR-N
3) Remove the spark plug. Refer to "Spark Plug
4) Remove the cylinder head cover (1).
5) Remove the cooling fan duct. Refer to "Cooling Fan
I705H1020070-06
6) Remove the valve timing inspection plug (2) and
Standard
Maintenance and Lubrication:
Box Removal and Installation in Section 1D
(Page1D-9)".
Removal and Installation (Page0B-3)".
1
Filter Inspection in Section 5A (Page5A-6)".
bring the piston to TDC on the compression stroke
by turning the crankshaft until the line "A" on the
generator rotor aligns with the slit "B" in the
generator cover.
2
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)
0B-4
B705H10206005
I705H1020009-01
"B"
"A"
I705H1020010-01