BoonDocker YAMAHA YZ-F: YZ450F Box - Manual (Page 3)

There are five fuel (psi) screens. These screens allow the user to make fueling adjustments for boost.
Each of the fuel screens are labeled with that screens corresponding RPM in the lower left hand corner
of the display and has four adjustment points 0, 33, 66, and 99. These adjustment points represent a
given throttle position (TPS) percentage, 0% being no throttle and 99% being full throttle. The adjustable
two digit numbers below each TPS value represents the amount of fuel that will be added to the given
RPM and TPS range. The values set in these psi screens will adjust fueling according to the
corresponding RPM and TPS ranges while automatically factoring in boost pressure. Each of the RPM
ranges blend into each other as demonstrated in the RPM figure below. Each TPS range blends to the
previous and next adjustment point as demonstrated in the TPS figure below.
To make adjustments, use the left and right arrow buttons to position the →(cursor) next to the
appropriate TPS value and use the up and down buttons to increase or decrease the fuel value.
To advance to the next screen press the SEL button.
psi →
0 33 66 99
6000 13 14 21 23
psi →
0 33 66 99
4300 03 04 09 00
psi →
0 33 66 99
7500 10 18 24 29
psi →
0 33 66 99
8700 25 31 27 31
psi →
0 33 66 99
10K 13 14 30 31
Note: The adjustable values displayed are only samples, intended to illustrate the manner in
which these values will affect the blending in each region.
TPS 66 0 99 33
Adjustable Values 05 10 07 11
RPM 5500 4300 7500 6700 8200
05 07 10 11 12 Applied (TPS) Values