Measurement Of Pressure Compression - Yamaha FZ-16 Service Manual

a. Start the engine and let it warm up for
few minutes and then leave the engine
up in the specified idle
Engine idle
1300-1500 r / min
b. Verify that the stationary pointer "a" in the
magneto cover is within the
firing interval "b" of the rotor magnet.
Improper firing interval
Ignition system
4. Remove:
Digital Tachometer
Stroboscope lamp
5. Assembly:
Screw access to mark time
(Along with the O-ring New)
MEASUREMENT OF PRESSURE
COMPRESSION
NOTE:
Insufficient compression pressure,
result in performance loss.
1. Measure:
Valve clearance
Out of specification
Refer to "ADJUSTING THE
VALVE CLEARANCE "on
page 3-3
-
2. Start the engine and leave for calendar
few minutes and then off.
3. Disconnect:
Spark plug cap
4. Remove:
The spark plug
→
Check the
b
→
Set.
CAUTION
Before removing the spark plug, clean air
compressed dirt that may have
accumulate in the spark plug gap for
prevent it from falling into the cylinder
5. Install:
Gauge "1"
Gauge
to
6. Measure:
Compression pressure
Out of specification? See steps
(C) and (d).
Compression pressure
1200 kPa (sea level)
a. Set the main switch in position
"ON"
b. With the throttle open, start the motor
boot until the reading of
gauge to stabilize.
c. If compression is above the
maximum specification, check deposits
carbon in the cylinder head surfaces
valves and piston head.
Carbon deposits
d. If the compression is below the
minimum specification, put a spoon
engine oil through the spark plug hole and
measure again.
See the table below.
3-8
1
→
Remove.
ENGINE