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Ride Height
This is the height the chassis sits and runs at. Turning the shock collar clockwise, looking down from the top, will
increase the pre-load on the spring and raise the chassis. You may want to try this when running on extremely
rough surfaces.
Changing the Spur Gear
If you are changing the size of the spur gear and/or pinion gears, you
will have to loosen the four screws that attach the motors (two screws
on each motor) to the motor plate and follow the directions for adjusting
the gear mesh.
1. Remove the gear cover. Use the included wrench to remove the
slipper adjustment nut by turning it counterclockwise.
2. Remove the old spur gear and install the new one of the same size.
3. Replace the slipper plate, washers and nut. See “Adjusting the
Slipper” for proper adjustment directions.
Replacing a Steering Servo
1. Locate and disconnect the servo lead where it plugs in the
receiver harness. There will be two of these, one for the left
servo and one for the right servo.
2. Turn the chassis upside-down and with the wheels pointing
straight forward, remove the Phillips screw from the center of
the servo arm (Figure 1). Set the screw, washer and spring to
one side and remove the bell crank.
3. Turn the chassis over, remove the small screws at the front
and back of the servo (Figure 2). Carefully remove the servo
feeding the servo lead through the chassis noting the proper
routing for the new servo lead.
4. Install the new servo connecting and routing the wires like the
one you removed. Secure the servo with the screws at the
front and rear.
5. Turn on the radio and remove the servo saver bottom from the
removed servo and install it on the new servo so that the “V-
Groove” is pointing toward the other servo.
6. Reinstall the bell crank, spring, and washer, securing them
with the Phillips screw.
Changing the Pinion Gear/Gear Ratio
You must always use the same spec of motor and size of pinion gear on both motors in the Mini-Monster Baja. When
you install hotter motors you may find it necessary to install smaller pinion gears to keep them from overheating. This
is usually caused when you are running in a confined area where the motors are not allowed to rev freely. At this point
both motors should be slightly loose on the motor plate.
1. Use the small Allen wrench included to loosen the setscrews in both pinion gears. Slide off the pinions and
replace them with the new size. If the new pinions do not slide on to line up with the spur gear, pull the motors
away from the spur for more clearance.
2. When aligned properly with the spur gear, tighten the setscrew on each pinion.
3. While looking closely at the teeth of the spur gear and one pinion push the motor toward the spur gear until you
can see they are just starting to mesh and slightly snug the mounting screws for that motor. Repeat this for the
other motor as well.
