BoonDocker YAMAHA YZ-F: YZ450F Box - Manual (Page 4)

Note: (The ACEL feature is useful for precise tuning, and if misused can create a wide range of tuning
issues. ACEL adjustment should only be made after all other tuning parameters have been properly
adjusted. ACEL adjustments should only be made by persons with an in-depth knowledge of tuning and
Boondocker control box use.)
The ACEL feature is an electronic accelerator pump that can be used to add (or subtract) fuel according
to throttle movement. When the throttle position is advanced (opened) the ACEL is activated.
Sensitivity (SN): The set sensitivity determines how far or fast the throttle position should be advanced
before the ACEL is activated. The value set below SN will determine the sensitivity, 01 being the most
sensitive and 10 being the least sensitive, 00 being on all of the time.
Amount (AL/AH): The set amount determines the amount of fuel that will be added (or subtracted)
when the ACEL is activated. The value set below AL will determine the amount of fuel that will be added
when the engine is being operated below 2.0 psi of boost. The value set below AH will determine the
amount of fuel that will be added when the engine is being operated above 2.0 psi of boost.
Duration (DR): The set duration determines the amount of time (number of engine cycles) the ACEL
feature will add or subtract fuel each time the ACEL is activated.
RPM →AL DR SN AH
ACEL 00 00 08 00