Engine Tuning; Carburetor Calibration - Rotax 125 MAX DD2 Installationsanleitung

Warning: When mixing fuel and fuelling do not smoke or allow naked flames. Gasoline
is highly flammable and explosive under certain conditions.
Warning: Never perform mixing and fuelling in closed rooms, handle fuel in well-
ventilated areas only.
Note: Do not fill the fuel container to the top.
Shake fuel container well.
Pour fuel into fuel tank of kart, using a funnel.
Close fuel tank and fuel container immediately after fuelling.
Warning: Before each fuelling, shake fuel container well to ensure adequate mixing of
the gasoline with the oil.
Warning: Fuel the kart only when engine is not running and with the ignition circuit
open on the ON/OFF switch.
Warning: Make sure that fuel will not splash onto hot engine components or equipment.
Risk of fire and explosion!
Warning: Pay attention to the safety advice of the kart manufacturer!
Attention: Don't spill fuel. Absorb spilled fuel with appropriate drying agent and ensure
ecological disposal.
Attention: Ensure that no contamination enters the fuel tank and the carburetor.
Attention: Unleaded fuel has a limited storage life. Store only the quantity of fuel in a container
which will be needed in the near future.

4. Engine tuning

4.1. Carburetor calibration

The standard carburetor calibration is for an ambient temperature of 25° C and 400m above sea
level. At operation with different temperatures and altitudes, the main jet of the carburetor has to
be changed in accordance with Table 1, to optimize engine performance.
Main jet
- 5° Celsius
+ 5° Celsius
+15° Celsius
+25° Celsius
+35° Celsius
Table 1A
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Operating Instructions 125 MAX DD2
altitude altitude
0 Meters 400 Meters
215 210
210 205
205 200
200 195
195 190
altitude altitude
800 Meters 1200 Meters
205 200
200 195
195 190
190 185
185 180
Ausgabe/edition 01/2006
altitude
1600 Meters
195
190
185
180
175