Two Brothers Racing
Juice Box™ - Fuel Controller
2009 Yamaha YFZ450 Installation & Operation Manual
Part # 008-243
Installation Instructions
V.A.L.E .
V A R I A B L E A X I S L O C K I N G E X H A U S T
TM
Unplug this connector and plug the female end of the
JUICE BOX™into the OEM harness. Plug the male end of
JUICE BOX™into the harness. (fig.5)
Route wires to rear of ATV and secure the JUICE BOX™
with the supplied velcro and zip ties to the wires secure
to frame.
Mount JUICE BOX™ in the storage area under the seat
assembly.
Connect ground wire to (-) side of battery terminal.
Start the ATV. The green LED should scroll left to right
and back for about 3-5 seconds and then go to 1 or more
steady or slowly flashing green LED’s. If the number 1
green LED AND number 8 red LED’s continue flashing
after startup or idling, an injector wiring error is indicated.
Re-check the wires from the JUICE BOX™ and make sure
they are connected to the proper wire of your ATV’s stock
harness. MAKE SURE you have the correct wires selected
in the stock harness. DO NOT PROCEED UNLESS ABOVE
CONDITIONS ARE MET.
NOTE: Re check your wire routing and JUICE BOX™
location and make certain that in no way the wires can
come into contact with any moving parts or high heat
source and that the JUICE BOX™ is mounted in a way as
to not cause a handling problem with the machine.
Reassembly is opposite of disassembly.
4.
5.
6.
7.
8.
9.
10.
Thank you for purchasing a genuine Two Brothers Racing
JUICE BOX™. This product represents a radical step
forward in tuning fuel-injected motorcycles and ATVs for
optimal performance using “load-based” technology.
We at Two Brothers Racing hope that you will find this
development as exciting and useful as we do. And
remember: Proper Fuel = Maximum Power!
Make sure the vehicle is completely cool before starting
the installation. Also, make sure the vehicle is secure and
will not roll around.
Remove the seat assembly. (fig.1)
Locate the injector at the rear of fuel tank. Black harness
with Gray connector. (figs. 2,3,4)
1.
2.
3.
Continued on page 2
Parts Incuded
Qty. Description Part Number
1 Juice Box™ Fuel Control Kit 008-243 (#9310141)
3 Zip Ties
1 Adhesive Velcro Square
IMPORTANT - PLEASE READ CAREFULLY
Warranty
Two Brothers Racing warrants that this product carries a warranty for 2 years from date of purchase against original
defects in materials and workmanship. Should this product fail to perform for either of the above reasons, Two Brothers
Racing will repair or replace it with an equivalent product at no charge, except for postage, to the original retail purchaser.
To obtain the benefits of this warranty, the retail purchaser must return the product and proof of purchase to the place of
original purchase.
We recommend that this performance part be installed by a qualied motorcycle
technician. If you have any doubts as to your ability to install this performance
part, please consult with your local motorcycle dealer. Read all instructions
rst before starting installation. Make sure the vehicle and exhaust system are
completely cool before starting the installation. Also, make sure the vehicle is
secure during installation. Be sure to save all stock components for possible use
later.
The Juice Box™ is legal ONLY for closed course race vehicles. The Juice Box™ is
not applicable, nor inteded for use on EMISSIONS CONTROLLED street, highway
or off-road vehicles. The Juice Box™ is not applicable, nor inteded for use on
aircraft.
Fig 1
Fig 2
Fig 3
Fig 4
Fig 5
(3 pages)
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