Valve Inspection; Valve Guide Inspection - Honda XL200 2001 Shop Manual

CYLINDER HEAD/VALVES
VALVE
Inspect the valve for trueness, burning, scratches or abnormal
stem wear.
Measure the valve stem O.D.
SERVICE LIMIT:
In: 5.44 mm (0.214 in)
Ex: 5.42 mm (0.213 in)
Insert each valve into the valve guide and check the valve
movement in the guide.
VALVE GUIDE
NOTE
• Ream the valve guide to remove the carbon build-up before
checking the valve guide.
• Always rotate the reamer clockwise, never couterclockwise
when installing, removing and reaming.
Measure and record each valve guide I.D. with a ball gauge or
inside micrometer.
SERVICE LIMIT: IN/EX: 5.50 mm (0.217 in)
Calculate the stem-to-guide clearance.
SERVICE LIMIT:
IN: 0.06 mm (0.002 in)
EX: 0.08 mm (0.003 in)
NOTE
• If the stem-to-guide clearance exceeds the service limit,
determine if a new guide with standard dimensions would
bring the clearance within tolerance. If so, replace the
guides as necessary and ream to fit.
• If the stem-to-guide clearance still exceeds the service limit
with new guides, replace the valve guide reamers
• Reface the valve seat whenever new valve guides are
installed.
6 -8
VALVE GUIDE REAMER
XL2 0 0