1997 Yamaha YFM600FWAK ATV Service Manual, Page 77Get this manual
COMPRESSION PRESSURE MEASUREMENTI ENGINE OIL LEVEL INSPECTION
IINSP Ito) ADJ
Compression pressure (at sea level): Standard: 850 kPa (8.5 kgcm2, 121 psi) Minimum: 800 kPa (8.0 kgcm2, 114 psi) Maximum: 900 kPa (9.0 kgcm2, 128 psi)
Measurement steps: Crank over the engine with the electric starter (be sure the battery is fully charged) with the throttle wide-open until the compression reading on the gauge stabilizes
A WARNING
When cranking the engine, ground the spark plug lead to prevent sparking
7.lnstall: Spark plug
IXl18 Nm (1.8 kg, 13 ft Ib) I
ENGINE OIL LEVEL INSPECTION 1.Place the machine on level surface2.lnspect: Engine oil level Oil level should be between the maximum G) and minimum marksOil level low 7 Add oil to the proper level