Engine Idle Speed; Idle Speed Adjustment - Honda CRF450L 2019 Owner's Manual & Off-Road Handbook

Engine Idle Speed

Engine Idle Speed

Refer to Important Safety Precautions on page 33.
Remember, idle speed adjustment is not a "cure
all" for other problems in your engine's PGM-FI
system. Adjusting the idle speed will not
compensate for a fault elsewhere.
The engine must be at normal operating
temperature for accurate idle speed adjustment.
When pushed in, the fast idle knob acts as the idle
adjustment screw.
Turning it counterclockwise results in a faster/
higher idle speed.
Turning it clockwise results in a slower/lower idle
speed.

Idle Speed Adjustment

1. If the engine is cold, start it and warm it up 3
minutes. Then shut it off.
2. Connect a tachometer to the engine.
3. Shift the transmission into neutral. Start the
engine.
4. Adjust idle speed with the fast idle knob (1).
Idle speed: 1,800 ± 100 rpm
(1) fast idle knob
(+) increase
(–) decrease
80
Servicing Your Honda
-
(1)
(–)
(+)