Remove the right wheel.
Remove the right mudguard.
Remove the spark plugs.
Disconnect the high voltage wire.
Disconnect the oil control valve (OCV) connector.
Remove the ventilation hose.
Remove the cylinder head cover. Make sure the engine is cold.
Measure the valve clearance.
To measure the valve clearance, turn the crankshaft clockwise so that piston No.1 is at TDC of the compression stroke.
Fig. 2.77. Valve clearance measurement procedure
Using a special feeler gauge, measure the valve clearance at point A (Fig. 2.77).
Record the measured values to select the appropriate valve lifters if replacement is required in the future.
Turn the crankshaft 360° clockwise so that piston No.4 is at TDC of the compression stroke.
Just like in the first case, measure the valve clearance at point B (see fig. 2.77).
Standard clearance (on a cold engine):
- inlet - 0.22–0.28 mm;
- release - 0.27–0.33 mm.
If the valve clearances are not within the norm, adjust them, or, if adjustment is not possible, replace the valve lifters with new ones.
Reinstall all removed parts in the reverse order of removal.