Yamaha YXR70FX, Руководство по обслуживанию

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3 - 10
CHK
ADJ
CHECKING THE IGNITION TIMING/
MEASURING THE COMPRESSION PRESSURE
c. Visually check the stationary pointer
a
to
verify it is within the required firing range
b
indicated on the AC magneto rotor.
Incorrect firing range
→
Check the ignition
system.
TIP:
When checking the ignition timing, make sure
that the timing light cord does not come in con-
tact with the exhaust muffler.
d. Install the timing mark accessing screw.
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4. Detach:
• timing light
• tachometer
5. Install:
• fuel tank
Refer to “FUEL PUMP AND FUEL TANK” in
chapter 6.
• rear console
• seats
Refer to “SEATS, REAR CONSOLE AND
INSTRUMENT PANELS” in chapter 8.
T
R
.
.
Timing mark accessing screw
6 Nm (0.6 m · kg, 4.3 ft · lb)
a
b
EBS00061
MEASURING THE COMPRESSION
PRESSURE
TIP:
_
Insufficient compression pressure will result in
a loss of performance.
1. Measure:
• valve clearance
Out of specification
→
Adjust.
Refer to “ADJUSTING THE VALVE
CLEARANCE”.
2. Start the engine, warm it up for several min-
utes, and then turn it off.
3. Remove:
• seats
• rear console
Refer to “SEATS, REAR CONSOLE AND
INSTRUMENT PANELS” in chapter 8.