Valve Seat Assembly - Honda XR80R Service Manual

Appl,. a thin coat ing of i'lUssi ar. Blue \0 t he "a\"e
seal.
Press the "alve throug h the va lve guide a nd onto
the
scallO
make
a
clear pattern ,
Th9locationoll~
If
the contact area is
100
high on the va lve, the seat
lIalve saal
In mus t be towe red using a 3Z-degu!e flat culh:l<.
felation 10 !fle vtllve
13Cfl
j s
very If the collTact area is
100
low on t he valve. the seal
jmporIant
lor good must be raised USing
a
SO-degree inner clJ tter.
saflling.
Refinish the seat to specifications. using
a
45-degree
finish cult er.
After cutting the seat. app ly lapping compound
10
th e valve face, and lap the va lve using lighl pressure.
Alter
l appi
ng. wash all
ro sidual compound o ff the
cylind er head and valve.
CAUTION:
Do not a/fow lapping compound to enter the guides.
ASSEMBLY
CYLINDER HEAD/VALVES
CONTACT TOO HIGH
~
~ ., ~OlDSE ATWIDTH
1 ..
~
CONTACT TOO LOW
'T ..
iOSEAT WIOTH
.,. :\
)( R80R:
'98 - ZOOO/
XR100R:
~~VALVE
COm'RS'_-L
SPRI NG RETAINER
AFTER 2000/
100R:
VALVE COlTERS.
SPRING
RETA 'N'," --~·~
OUTER
SPRING
STEM SEAL
SPRING
VALVE SPRING
INTAKEVALVI'-------~:11
';-'JUTrER VALVE S""Ne;-/..
INNER VALVE SPRING
',./. ___ SP"",G
SEAT
--'w
M
SEAL
- - - " ' H A I"T VA LVE