Honda CRF50F Owner's Manual page 85

LEFT SIDE
(8)
(7) feeler gauge
(8) adjusting screw
(9) adjusting screw lock nut
4. Check the clearance of both valves by
inserting a feeler gauge ( ) between the
adjusting screw ( ) and the valve stem. 8
Clearance should be:
0.002 in (0.05 mm)
Intake:
0.002 in (0.05 mm)
Exhaust:
5.
(7)
6.
(9)
7.
7
Valve Clearance
If it is necessary to make an adjustment,
loosen the adjusting screw lock nut ( ) and
turn the adjusting screw so there is a slight
resistance when the feeler gauge is inserted.
After completing the adjustment, tighten the
adjusting screw lock nut while holding the
adjusting screw to prevent it from turning.
Finally, recheck the clearance to make sure
that the adjustment has not been disturbed.
Install the left crankcase cover.
Install and tighten the bolts A, bolt B and
adjusting hole caps.
Servicing Your Honda
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