Balance Gear; Ignition Unit; Electric Starter; Electro Pneumatically Exhaust Timing Control - Rotax 125 DD2 MAX EVO Operator's Manual

BALANCE GEAR

The balance gear is mounted on the primary shaft and rotates counter-wise to the crank-
shaft to reduce engine vibration.
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IGNITION UNIT

The control of the ignition system is exercised by the ECU (Engine Control Unit). To calcu-
late the ignition timing, an engine speed sensor is needed, which is installed on the bottom
of the engine housing. There is no manual adjustment of the ignition system necessary
and/or possible.
If the power button is pressed once, the ignition is activated and the button lights up. To
start the engine, it only needs to be pressed once again. To turn off the engine as well as
the ignition, proceed in reverse order.
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ELECTRIC STARTER

By pressing the "START" button, the circuit between the battery and the electric starter will
be closed by a relay. The electric starter drives the starter gear on the crankshaft via an in-
termediate gear with free wheeling, until the engine starts to run. An automatic switch re-
set from "START" to "ON" is integrated.
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ELECTRO PNEUMATICALLY EXHAUST TIMING CONTROL

The engine type 125 MAX DD2 evo is equipped with an electro-pneumatic exhaust con-
trol. The E-RAVE (Electronic ROTAX Adjustable Variable Exhaust) system is controlled by
an electro-pneumatic valve via the ECU. The vacuum required is provided by the engine
crankcase.
If the engine is running at idle speed or below the opening point of the E-RAVE system
(between approximately 8000-9000 rpm) the exhaust valve is closed. With the engine run-
ning, it closes or opens the electro-pneumatic valve of the exhaust depending on the
speed and, therefore it provides optimum performance characteristics.
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INTAKE SILENCER

The intake silencer incorporates an air filter to clean the intake air. The intake silencer has
been designed for optimum reduction of air intake noise level and represents a tuned sys-
tem with the engine.
The air filter consists of several layers and has been optimized in the area of air passage
and filter efficiency. If soiled or during engine maintenance work, clean the filter with biode-
gradable products.
Effectivity: 125 MAX DD2 evo
BRP-Rotax
Operators Manual
1
Page 3
Edition: March 01 2021