Honda XL350R 1984 Shop Manual page 80

CYLINDER HEAD/VALVES
VA LVE/vA LV E GUIDE INSPECT ION
In$peet 8C1Ch valve for truene5S, burning, scra tches or
abnormal stem wear.
Check valve movement in the gu ide. Measure and
record each valve stem 0. 0 .
SERVICE LIMITS:
INTAKE: 5.46 mm (0.215 in)
EX HAUST: 5.45 mm (0.214 i n)
Measure and record each valve guide 1.0. using a
ball gauge or
inside micrometer.
SERVICE LIMIT:
INTA KE / EXHAUST: 5.53 mm 10.218 in)
NOTE
Ream the guides to remove carbon bu ild-up
before checking the valve guide 1. 0 .
Calcu late the stem·toiluide clearance.
S ERVICE LIMITS:
INTAKE: 0.065 mm (O.D026 in)
EXHAUST : 0.080
mm
(0.0031
in)
NOTE
If the stem-to-guid e clearance exceeds the
service limit, determine if a new gu ide with
standard dimensions would bring the clear-
ance within tolerance. If so, replace gu ides as
necessary and ream to fit .
If
stem·toijuide clearance still exceeds the service
limit when new guides are installed. replace the
valves.
NOTE
Aeface valve seats whenever new vallie guides
are installed.
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