High Altitude Adjustment (U .S.a. Only) - Honda Nighthawk CB 750 1991 Service Manual

Fuel System
12. Apply Loctite 601 or eqivalent to the inside of the limiter
caps. Place the caps over the pilot screws so that they
can be turned clockwise only. This will prevent adjust-
ment in the counterclockwise direction which richens
the fuel mixture.
NOTE
.
Be careful not to turn the pilot screw when installing
the limiter cap.
I
(1) PILOT SCREW
I
(2)
STOPPERS
High Altitude Adjustment (U .S.A.
Only)
When the vehicle is to be operated continuously above
2,000 m (6.500 feet). the carburetor must be readjusted as
follows to improve driveability and decrease exhaust emis-
sions.
Warm up the engine to operating temperature. Stop and go
riding for 10 minutes is sufficient.
Turn each pilot screw to the specification below.
High Altitude Sening: 112-turn i n
Adjust the idle speed to 1,000+ 100 rpm (California:
1,000+ 100 rpm) with the throttle stop screw.
1 . . . . . 1
Pilot screw wrench 07908-4730001 or
equivalent commercially
available i n U.S.A.
(Cal Van 466)
NOTE
This adjustment must be made at high altitude to
ensure proper high altitude operation.
Anach a Vehicle Emission Control Information Update Label
onto the rear fender under the seat as shown in the label
position illustration.
NOTE
/
.
Do not anach the label to any pan that can be easily
removed from the vehicle.
Sustained operation at an altitude lower than
5.000 feef (1,500 m) with the carburetor adjusted
for high altitude may cause the engine to idle
roughly and the engine may stall i n traffic and may
mnlcLE EMISSON CONTROL INFDRMA~ON UPDATE
1.
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THE MHW HAS BEEN MJUE-TED
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TROL INFORMATION