Bandit is a high-speed machine with plenty of power and all-terrain
capability, but we're going to demonstrate how a few simple upgrades can provide a
major power boost and dramatically increase top speed. We will install a
new power system, change the gearing, and add a high speed 3S LiPo battery to
complete the upgrade. For tools, we will just need 1.5, 2, and 2.5mm
hex tools, a Philips head screwdriver, and a
7mm nut driver. See a list of all parts and accessories used in the
description. For the power system, we will use the Velineon VXL-3S brushless
system. This ultra efficient, low maintenance system is optimized for
maximum power flow. For the gearing, we will install a 28-tooth pinion gear
and a 76-tooth spur gear. This gearing will increase the top speed of
the model, but should only be used for high speed running on even terrain. For
general driving, you can keep the stock gearing. See the manual for the Bandit VXL
for all gearing combinations there are many battery options-- we will go with
a 3-cell (3S) 4000 mAh LiPo battery, which can be charged
with a LiPo charger like the EZ Peak Live. A 3-cell (3S) LiPo can provide the
most power and speed, but we also like to use a 2-cell (2S) 5800 LiPo for general
driving and long run times. Even when used with a 7-cell nickel-metal-hydride
battery the brushless motor will provide more speed and power when used with
appropriate gearing. Be sure to follow all instructions and warnings included
with batteries and chargers. First we will install the new power system with
the model powered off and battery removed, unplug the motor from the ESC.
Now open the wire clamp and receiver box cover.
Unplug the ESC from the channel 2 slot in the receiver. Remove the original ESC
from the chassis.
Install the new VXL-3S speed control with the included mounting hardware, then
route the connector into the receiver box and plug it into the channel 2 slot
on the receiver.
Note that there are two channel 1 slots so make sure that the plug goes into a
channel 2 slot. Now close the receiver box--see the related video on how to
ensure a watertight seal on the receiver box.
Tto remove the original motor, take off the back right wheel and carefully set
aside the small pin. Remove the gear cover. Go ahead and remove the original
spur gear if installing the new gearing.
Remove the original motor.
If your model has a fixed gear adapter that says a 'B' like this one, it can be
used with the new gearing combination with the lower motor screw in the 'A' position.
This adapter is also included with part #3790 and includes a guide for
use with other popular gearing combinations. The adapter is recommended
for higher speed VXL models and it will make setting the gear mesh a little
easier. If installing the motor without a fixed gear adaptor make sure the motor
screws are tight and see the related video for more information on setting a
proper gear mesh. Install the new 76-tooth spur gear, put the adapter in place,
and install the new Velineon motor. Use the included hex screws to secure the
motor. Put the new 28-tooth pinion gear on the motor shaft with the small screw securing it against the flat side of the shaft. With the motor and gears secured, replace the gear cover and wheel.
Put the small pin back in place before securing the wheel. Ensure that the wheel
is properly seated on the pin before tightening the wheel nut. Connect the
motor to the ESC using the color-coded wires and plug in the charged
LiPo battery.
When installing new electronics like a speed control or radio system, it's a
good idea to calibrate the new ESC. See the related video for instructions. Also
ensure that low voltage detection is enabled when running a LiPo battery. The
light will glow green when low voltage detection is enabled. Now the bandit is
ready for even more speed and power. For more tips, tricks, and upgrades, visit us
at Traxxas.com