Replacing A Spark Plug; Valve Clearance Inspection - Honda 2000 XR50R Service Manual

CAUTION:
To prevent damage to the cylinder head, hend-
tighten thtl spark plug before using
B
wrtmch
to
tighten to the
specified
torque.
Reinstall the spark plug in the cylinder head and
hand tighten, then torque it using a spark plug
wrench.
TORQUE: 12 N·m (1.2 kgf·m, 9 Ibf.ft)
REPLACING A SPARK PLUG
Set the plug gap to specification with a wire-type
feeler gauge (see p revious page).
CAUTION:
Do not overtighten the spark plug.
Install and hand tighten the new spark plug, then
tighten
it
about 1/2 of a turn after the sealing
washer contacts the seat of the plug hole.
Install the spark plug cap.
VALVE CLEARANCE
INSPECTION
Inspect
and
adjust
Remove the valve adjuster hole caps.
the valve
clearance while
the eng/fIB/s cold
(below
95°F/ 35 °C).
Remove the l eft crankcase cover (page 10-2).
Turn the crankshaft counterclockwise and align the
"T" mark on the flywheel with the i ndex notch on
the left crankcase.
Make sure the piston at roc (Top Dead Center) on
the compression stroke.
This position can be obtained by confirming that
there is slack in the rocker arm.
If there is no slack, rotate the crankshaft one full
turn counterclockwise and match up the ''Too mark
again.
MAINTENANCE
" T "MAAK
3-7