Yamaha TT600R Service Manual page 65

COMPRESSION INSPECTION
8. Check:
•
Pressure under compression
Inspection:
•
Turn the main switch to "ON".
•
With the throttle wide open, crank the engine
until the reading on the compression gauge
stabilized.
WARNING
While operating the starter, disconnect the
spark plug cap to avoid sparks.
•
Compare the pressure reading with those in
the table.
Pressure under compression:
Standard
1,100 kPa (11 kg/cm
Minimum
900 kPa (9 kg/cm
Maximum
1.200 kPa (12 kg/cm
•
If the pressure reading is lower than minimum:
1) Add a few drops of oil to the cylinder through
the hole in the spark plug.
2) Measure the compression again.
3) Compare the new reading with the first, then
proceed according to the indications in the
table.
3-13
INSP
ADJ
2 , 156 psi)
2 , 128 psi)
2 , 171 psi)