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CB25ü Addendum
Pilot
Screw Adjustment
(die Drop Procedure
If the engine must be running to do sorne work, make
sure the area is well-ventilated. Never run the engine
in an enclosed area.
.
The exhaust contains poisonous carbon monoxide
gas that may cause loss of consciousness and may
lead to death.
NOTE
• The pilot screw is factory pre-set and no adjustment
is necessary unless the pilot screw is replaced.
Use atachorneter with graduations of 50 min-
1
(rpm)
change.
1. Turn the pilot screw clockwise until it seats lightly, then
back it out to the specification .given. This is an initial
setting prior to the final pilot
sc~ew
adjustment.
CAUTION
• Darnaqe to the pilot screw seat will occur if the pilot
screw is tightened against the seat.
Initial Opening: 1 - 5/8 turns out
2. Warm up the engine to operatinp temperature.
Stop and go riding for 10 minutes is sufficient.
3. Attach a tachometer according to its manufacturer's·
instructions.
4. Adjust the idle speed to thespecified rpm with the
throttle stop screw.
Idle Spe,ed: 1,500 ± 100 rnirr ' (rpm)
5. Turn pilot screw in or out slowly to obtain the highest
enginespeed.
6. Readjust the idle speed wíth the throttle stop screw.
7. Turnthe pilot screw ingradually until the engine speed
drops 50 rnirr ' (rprn).
8. Turn the pilot screw counterclockwise to the final open-
ing from the position obtained in step 7.
Final Opening: 1/4 turns out
9. Readjust the idle speed with the throttle stop screw.
19-20
(1) PILOT SCREW
(1) THROTILE STOP SCREW
(1) PllOT SCREW
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