Measuring The Compression Pressure - Yamaha FJR1300N 2001 Service Manual

CHECKING THE IGNITION TIMING/

MEASURING THE COMPRESSION PRESSURE

5. Remove:
• fuel tank
• engine tachometer
• timing light
6. Install:
• timing mark accessing screw
• right side cowling
Refer to "COWLINGS AND COVERS".
• T-bar
• fuel tank
• rider seat
Refer to "SEATS AND FUEL TANK".
EAS00065
MEASURING THE COMPRESSION
PRESSURE
The following procedure applies to all of the
cylinders.
NOTE:
@
Insufficient compression pressure will result in
a loss of performance.
1. Measure:
• valve clearance
Out of specification → Adjust.
Refer to
CLEARANCE".
2. Start the engine, warm it up for several min-
utes, and then turn it off.
3. Remove:
• rider seat
• fuel tank
• T-bar
Refer to "SEATS AND FUEL TANK".
4. Disconnect:
• spark plug cap
5. Remove:
• spark plug
CAUTION:
@
Before removing the spark plugs, use com-
pressed air to blow away any dirt accumu-
lated in the spark plug wells to prevent it
from falling into the cylinders.
3 - 35
CHK
ADJ
"ADJUSTING THE VALVE