Yamaha FZ6-ST Supplementary Service Manual - Chk
3-25
MEASURING THE COMPRESSION PRESSURE
CHK
ADJ
18 Nm (1.8 m
Skg, 13 ftSlb)
d. If the compression pressure is below the
minimum specification, pour a teaspoonful of
engine oil into the spark plug bore and mea-
sure again.
Refer to the following table.
Compression pressure
(with oil applied into the cylinder)
Reading
Diagnosis
Higher than
without oil
Piston ring(s) wear
or damage
!
Repair.
Same as without
oil
Piston, valves,
cylinder head
gasket or piston
possibly defective
! Repair.
7. Install:
Sspark plug
8. Install:
Sspark plug caps
Signition coils
9. Install:
Sheat protector plate
Sbattery box bracket
Sbattery box
Refer to “BATTERY BOX AND BATTERY
BOX BRACKET”.
Sbattery
Refer to “CHECKING AND CHARGING THE
BATTERY” in chapter 3.
Sair filter case
Refer to “AIR FILTER CASE”.
Sfuel tank
Refer to “FUEL TANK”.
Sfront cowling inner panel (letf and right)
Refer to “COWLINGS”.
Srider seat
Refer to “SEAT”.