Measure valve clearance with feeler gauge.
Correct valve clearance with adjusting screw and tighten locknut.
Valve clearances with engine cold (max. 35°C/95°F):
- Inlet — 0.15 mm (0.0056 in)
- Exhaust — 0.30 mm (0.0118 in)
Tightening torque: Locknut — 8 Nm
Recheck valve clearances. Feeler gauge must pull through between valve stem and adjusting screw with slight resistance.