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Gearing Compatibility Chart:
The chart below shows recommended
gear combination ranges for your model.
Spur Gear
46
50
54
16
-
-
3.38
17
-
-
3.18
18
-
-
3.00
19
-
-
2.84
20
-
2.50
2.70
21
-
2.38
2.57
22
-
2.27
2.45
23
-
2.17
-
24
1.92
2.08
-
25
1.84
2.00
-
26
1.77
-
-
27
1.70
-
-
Out of Box Setup; recommended for most
running, 3s/4s LiPo.
3s 4000mAh + recommended
4s 5000mAh + recommended
Usable gearing range for 3s/4s LiPo.
Increases torque and run time.
3s 4000mAh + recommended
4s 5000mAh + recommended
Usable gearing range for 3s/4s LiPo for high
speed runs on hard smooth surfaces only.
3s 4000mAh + recommended
4s 5000mAh + recommended
High speed gearing for 3s/4s LiPo, high
speed runs (60+mph) on hard smooth
surfaces only.
3s 4000mAh + recommended
4s 5000mAh + recommended
Fits; not recommended for use.
Does not fit.
24 • MAXX
BASIC TUNING ADJUSTMENTS
MOTORS AND GEARING
One of the more significant advantages to your model's
transmission is the wide range of available gear ratios. Changing
the gearing allows you to fine tune the speed of the model and
control the temperatures of the battery pack and motor. Use a
lower gear ratio (numerically larger) to reduce current draw and
temperatures. Use a higher gear (numerically lower) to increase top
speed. Use the following formula to calculate the overall ratio for
combinations not listed on the gear chart:
# Spur Gear Teeth
x 5.69 = Final Gear Ratio
# Pinion Gear Teeth
When using higher gear ratios, it is important to monitor the
temperatures of the battery, motor, and speed control. If the
battery is extremely hot (150°F) and/or the motor is too hot to
touch (200°F), your model is probably over-geared and drawing
too much current. This temperature test assumes that the model is
close to factory stock weight and operates freely with no excessive
friction, dragging, or binding, and the battery is fully charged and
in good condition. Note: If not using the pin system, check and
adjust gear mesh if a spur and/or pinion gear is changed.
This model is equipped with a Velineon 540XL 2400Kv brushless
motor. The gear combination that comes stock on each model
provides good overall acceleration and top speed. If you want more
top speed and less acceleration, install optional high speed gearing
(more teeth). If you want more acceleration and less top speed, use a
smaller optional pinion gear. Optional gearing not included.
Note: High speed gearing is intended for high-speed running on
hard surfaces and is not recommended for off-road or repetitive
starting and stopping. For this type of driving, smaller pinion
gears are recommended to reduce load on the motor.
Adjusting Gear Mesh
Incorrect gear mesh is the most common cause of stripped spur
gears. Maxx makes improper gear mesh virtually impossible. A pin
system helps set the motor in the proper place according to the
pinion and spur gear that are selected.
To access the pin system, remove the single 4x8mm button-head
cap screw from the motor plate and the two 4x12mm button-head
cap screws from the bottom of the chassis. Next, remove the two
3x10mm cap screws that secure the gear cover and remove the gear
cover. Lift off the motor to expose the pin that goes between the
motor and the chassis. Be sure not to lose this pin!
Select the desired gearing from the pin location chart. Replace the
spur and pinion gears as needed. When installing the motor, install
the pin into its proper location based on the gearing that is chosen.
Secure the motor in place with the two 4x12mm button-head cap
screws inserted from the bottom of the chassis, and then the single
4x8mm button-head screw in the motor plate.
Pin Locations for
Setting Gear Mesh
Spur Gear
46
50
54
16
-
-
A
17
-
-
B
18
-
-
C
19
-
-
D
20
-
A
E
21
-
B
F
22
-
C
H
23
-
D
-
24
A
E
-
25
B
F
-
26
C
-
-
27
D
-
-
Note: Should you choose
to do so, you can also set
the gear mesh manually
without the pin. With
the pin removed, use the
two 4x12mm button-
head cap screws on the
bottom of the chassis to
set gear mesh. Loosen
the two 4x12mm button-
head cap screws.
Cut a narrow strip of notebook paper and run it into the gear mesh.
Slide the motor and pinion gear into the spur gear. Tighten the two
4x12mm button-head cap screws, and then remove the strip of
paper. You should be able to run a fresh strip of paper through the
gears without binding them.
3x10mm CS
Pin
4x8mm BCS
4x12mm BCS
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