V1.0
RUNGU Electric Juggernaut Mid-Drive Version (MDV) User Manual
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2018 model year
Copyright 2018 Standard Bearer Machines, LLC
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Using the Front Suspension
The front suspension has two manual controls that can change ride and handling characteristics.
Looking from above astride the MDV, the right-side knob controls the stiffness of the suspension. The
left side switch is used to disable/enable the suspension.
To stiffen or loosen the suspension, turn the right-side knob clockwise or counter-
clockwise respectively. All MDVs ship with the suspension at the loosest setting. If
you find that the front end dives too much, or that you are having difficulty turning
on soft ground (sand, snow), increase the stiffness of both forks by turning the knob
clockwise.
When activated, the optional front suspension for the Electric Juggernaut makes
cornering on hard surfaces smooth and improves control on soft sand. Under
some circumstances such as when the rear wheel drifts sideways in very soft sand,
the suspension may make it difficult to stay upright. Under these circumstances,
Rungu recommends disabling the front suspension by turning the switch from the
Open position to the Lock position.
Using the parking brake switch
The front or rear hydraulic brake (or both) levers have a parking brake switch. To operate the switch,
hold in the brake lever and flip the switch. The switch holds the brake lever in place, which holds the
rotor in place and prevents the MDV from moving when parked. The parking brake is very useful when
parking on angle. REMEMBER to switch off the parking brake before riding.
NOTE: Riding with the parking brake engaged produces significant wear on the brake pads leading to a
decrease in brake pad life and stopping power. Warranty DOES NOT cover replacement brake pads.
Using Gear Shifters
The MDV has trigger-style gear shifters common to mountain bicycles; when used, they optimize your
MDV riding experience and apply the appropriate power to the appropriate terrain. The shifters let you
change the gear ratio between the motor and the rear wheel to best leverage the power coming from
the motor regardless the power level. Like the transmission in a car, being in the wrong gear can cause
the car to stall or use excessive energy to maintain speed. The same holds true with the MDV.
The MDV has 10 gears
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first gear has the largest sprocket on the rear wheel; tenth uses the smallest.
First gear has the lowest gear ratio between the motor and the rear wheel. This gear is used for hill
climbing or crossing the most difficult soft terrain. Tenth gear has the highest gear ratio, therefore i
t’s
used for cruising on flat roads to achieve the highest speed.
You use your right thumb and index finger to shift gears. Each press of the thumb or pull of the index
finger against the shifter indexes the gear. Pressing the shifter with the thumb changes decreases the
gear by one starting at tenth gear. Pulling the shifter increases the gear by one starting with first gear.
