Honda NSS250A Reflex 2001-2007, Руководство пользователя

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CYLINDER HEAD/VALVES
9-6
CYLINDER COMPRESSION TEST
Warm up the engine to normal operating tempera-
ture.
Stop the engine and remove the spark plug cap and
spark plug (page 4-7).
Install a compression gauge into the spark plug
hole.
Open the throttle all the way and crank the engine
with the starter until the gauge reading stops rising.
The maximum reading is usually reached within 4 –
7 seconds.
Low compression can be caused by:
– Blown cylinder head gasket
– Improper valve clearance adjustment
– Valve leakage
– Worn piston ring or cylinder (page 10-5)
High compression can be caused by:
– Carbon deposits in the combustion chamber or
on piston head
POSITIONING THE PISTON AT TDC
(Top Dead Center) ON THE
COMPRESSION STROKE
Remove the timing hole cap and O-ring.
Remove the following:
– Left crankcase cover (page 11-7)
– Cylinder head cover (page 9-7)
Rotate the drive pulley face (crankshaft) counter-
clockwise using the special tool and align the "T"
mark on the flywheel with the index line in the right
crankcase cover.
To avoid discharging
the battery, do not
operate the starter
motor for more
than 7 seconds.
COMPRESSION PRESSURE:
1,569 kPa (16.0 kg/cm
2
, 228 psi) at 350 min
-1
(rpm)
COMPRESSION GAUGE
TIMING HOLE CAP/O-RING
TOOL:
Universal holder
07725-00300000
UNIVERSAL HOLDER
DRIVE PULLEY FACE Align
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