c. Measure the valve clearance with a thick- ness gauge 1 . Thickness gauge 90890-03079 Narrow gauge set YM-34483 1 LLL L L LLL L L LLL L L LLL L L LLL L L LLL L LLL Out of specification Adjust. 8. Adjust: valve clearance 3 4 MMM M M MMM M M MMM M M MMM M M MMM M M MMM M MMM a. Loosen the locknut 1 . b. Insert a thickness gauge 2 between the end of the adjusting screw and the valve tip. c. Turn the adjusting screw 3 with the tappet adjusting tool 4 until the specified valve clearance is obtained. 1 2 Tappet adjusting tool 90890-01311 Valve adjuster 3 mm & 4 mm YM-08035-A d. Hold the adjusting screw to prevent it from moving and tighten the locknut to the speci- fied torque. e.
Measure the valve clearance again. f. If the valve clearance is still out of specifica- tion, repeat all of the valve clearance adjust- ment steps until the specified clearance is obtained. LLL L L LLL L L LLL L L LLL L L LLL L L LLL L LLL 9. Install: timing mark accessing screw crankshaft end accessing screw 10.Install: spark plug 11.Connect: spark plug cap 3 - 21 ADJUSTING THE VALVE CLEARANCE CHK ADJ T.R. Locknut 14 Nm (1.4 m · kg, 10 ft · lb) T.R. 6 Nm (0.6 m · kg, 4.3 ft · lb) T.R. 10 Nm (1.0 m · kg, 7.2 ft · lb) T.R. 13 Nm (1.3 m · kg, 9.4 ft · lb)