Idle Drop Procedure (After '99) - Honda XR80R Service Manual

IDLE DROP PROCEDURE (AFTER '991
t1Wi,iWid
If
the engine must be running to do some work,
make sure the area is well ventilated. Never rUn the
engine
i n
an en&losed area. The exhaust &ontains
poisonous l!arbon mono"ide gas that mar cause
loss of consciousness and mar lead to death . Run
the
engine
in an optm area
or
with
an
e"haust
evacuation srstem in endosed area.
NOTE:
The air screw is factory pre-ser. Adjustment is not
necessa ry unlas5 the carburetor is overh au led or
new ai r screw is i nstalfed.
Th e ong i ne must be warm lor accurate
actiustment. Ten minutes of stop' and-go riding i",
sufficien!.
Use a tachometer with gradua tions 0150 rpm or
smaller that wi ll accurately i nd ic ate 50 rpm
change .
1. Turn the air screw clockwise urtti l it seats lightly,
t hen back it out 10 the specification given.
CAUTION:
FUEl SYSTEM
Damage to the air Sl!rew seat
will
Ol!cur
if
th e a;,
L_~ A~ IR~S~C~R~EcW~
_ _ _ _ _ _ _
",,,,=-,'o'~~_
screw;s tightened against the seat.
INInAL OPENING: 2-118 turns ou t
2. Warm the eng ine up to ope ra ti ng temperature.
J. Stop th e engine an d connect a tachomoter
accord in g to the tachometer manufacture's
instructions.
4. Start the engine and adjust the id le speed with
the t hronle stop screw.
IDLE SPEED: 1,5oo :!: 100 rpm
5. Tu rn the air screw in orOU1 slowly to obta in the
highest engine speed.
6. Readiust the idle speed wit fl the t flrm! le £.top
sc rllW.
7. Turn the air screw in gradua ll y until the engine
speed drops 100 rpm.
8. Turn the air screw canter-clockwise the number
o f turns to Ihe spllci fieation g iven.
FINAL OPENING: 1/2 turns out
9. Readjust t he idle speed wit h the thrott le stop
screw.
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