Honda XL350R 1984 Shop Manual page 55

AIR SCREW
REMOVA L / I NSTA LLAT ION
NOTE
• The air screw is factory preset and should
not be removed unless the carburetor is
overhauled.
• The air screw must be replaced with a new
one whenever
it
is removed.
Using pliers. break off the air screw limiter cap and
then remove the remai nder of the air screw.
I nstall a new air screw and then adjust
it
as de-
scribed below.
NOTE
Do not install a limiter cap on a new air screw
until after ad justment has been made (see
below!.
ADJUSTMENT
NOTE
• The air screw is factory preset and no ad-
justment is necessary unless the air screw
is replaced (see removal above).
• Make sure that the secondary carburetor
ad justment is complete (see Page 4-10).
1. Turn the new air screw clockwise until
it
seats
lightly and back it out to the specif ication given.
This is an initial setting prior to the final air
screw adjustment.
INITIAL OPENING : 2- 1/ 8
t urn
out
CAUTI O N
Damage to the air screw seat will occur If the
air screw is tightened against the seat.
2. Warm up the engine to operating te mperature.
Stop and go drilling
for 10 minutes is
sufficient.
3.
Attach a tachometer.
4. Adjust the idle speed with the throttle stop
screw.
IDLE SPEED : 1,300 ± 100 rpm
5. Turn the air screw in or out slowly to obtain the
highest engine speed.
6. Readjust the idle speed with the throttle stop
screw.
7. Mak.e sure that the engine dose not miss on run
erratically. Repeat steps 5 and 6 until engine
speed increases smoothly.
8. Readjust the idle speed with the throttle Stop
screw.
FUEL SYSTEM
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AIR SCREW LI MITER CAP
A IR SCREW
4-11