Choice Of Gear Ratio - Rotax 125 MAX DD2 Einbauhinweise Und Betriebsanleitung

Note:
Attention: The fuel filter (32) must be inspected periodically and cleaned as required.
Note:
Note:
Note:

4.2. Choice of gear ratio

The 125 Max DD2 engine in spite of its 2 gears offers a broad performance band. Therefore the
frequent changing of gear ratios, as you are used to with 1-speed engines, is not necessary.
Note:
On most of the Kart circuits you will be well served with the standard gear ratio (35/62 which is
equivalent to 12/90 for 1
If due to the special shape of the circuit (e.g. extremely sharp corners or long straights) if it should
seem necessary, the gear ratio can be changed both to a shorter or a longer ratio.
The diagram (acceleration potential) depicts that the engine has its optimum acceleration potential
between 9.200 and 12.200 r.p.m. /min. It should therefore be operated in this range.
When the engine speed exceeds 12.200 r.p.m. the torque drops and in consequence the
acceleration potential, therefore you should shift from 1
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Operating Instructions 125 MAX DD2
slightly leaner. If the clip (4) is set into 'position 4', the fuel mixture will become
slightly richer in the part and full-load range.
The fuel filter (32) is located below the fuel inlet on the carburetor, preventing
contamination from entering the carburetor which could impair operation of the
carburetor.
Remove the hex. screw (34) and gasket ring (33).
Pull out the fuel filter (32) and clean the filter and fuel inlet.
Refit the fuel filter (32), the gasket ring (33) and hex. screw (34).
When trying to start the engine it will take a few seconds for the fuel pump to fill the
float chamber and for the engine to start.
With the adjustment screw (36), the idle speed of the engine can be adjusted. By
turning in the adjustment screw (36) the idle speed increases and by turning out the
screw (36) the idle speed will be reduced.
With the adjustment screw (31), the fuel mixture formation can be adjusted. By
turning in the adjustment screw (31), the air-fuel mixture will become richer at idling
and by turning out the screw (31), the air-fuel mixture will become leaner at idling.
It is not possible to change the 1
st
gear and 14/79 for 2
manuals search engine
st nd
and 2 gear individually.
nd
gear).
st nd
into 2 gear at 12.200 r.p.m.
Ausgabe/edition 01/2006