Yamaha YZF-R1PC Utility Trailer User Manual


 
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CHK
ADJ
MEASURING THE COMPRESSION PRESSURE
1. Measure:
valve clearance
Out of specification Adjust.
Refer to ADJUSTING THE VALVE CLEAR-
ANCE.
2. Start the engine, warm it up for several min-
utes, and then turn it off.
3. Remove:
rider seat
Refer to SEATS.
fuel tank
Refer to FUEL TANK.
air filter case
ignition coil plates
rubber baffle
Refer to AIR FILTER CASE.
4. Remove:
spark plug
ignition coil
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.
5. Install:
compression gauge 1
6. Measure:
compression pressure
Out of specification Refer to steps (c)
and (d).
Compression gauge
YU-33223
Adapter
YU-33223-3