Yamaha YZF-R1(B) 2012 Service Manual page 253

Compression pressure (with oil applied into
the cylinder)
Reading
Higher than without
oil
Same as without oil
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7. Install:
• Spark plugs
• Ignition coils
Spark plug
13 Nm (1.3 m·kgf, 9.4 ft·lbf)
8. Install:
• All removed parts
TIP
For installation, reverse the removal proce-
dure.
Diagnosis
Piston ring(s) wear or
damage → Replace.
Piston, valves or cyl-
inder head gasket
possibly defective →
Replace.
ENGINE INSPECTION
5-2