Operating Instructions 125 MAX DD2
Seite/page 73/100
Ausgabe/edition 01/2006
OPERATING INSTRUCTIONS FOR ROTAX ENGINE
TYPE 125 MAX DD2
1. Design of the Rotax engine 125 MAX DD2
2.1.
Single cylinder two cycle engine, reed valve controlled, 125 cm
3
displacement
2.2.
Liquid cooled, forced flow by integrated water pump
2.3.
Balance gear
2.4.
Digital battery ignition with electronic rev. limiter
2.5.
Integrated electric starter
2.6.
Pneumatic controlled exhaust timing
2.7.
Piston carburetor Dell’orto VHSB 34
2.8.
Intake silencer with integrated air filter
2.9.
Tuned exhaust with after-muffler
2.10.
2-speed gearbox operated by shift paddles from the steering wheel
2.11. E
lectronic
S
hifting
A
ssistant (ESA)
2.12.
Pneumatic controlled fuel pump
2.13.
Centrifugal clutch
2.14.
Power take off directly on rear axle with overload clutch
2. Technical description of the Rotax engine, Type 125 MAX DD2
2.1. Type of engine
Single cylinder two cycle engine with reed valve controlled inlet. Mixture lubrication is achieved by
adding oil to the gasoline in a specified mixing ratio.
The Power transmission to the rear axle is via a manually shiftable integrated 2-speed gearbox and
not as usual via a maintenance intensive chain drive.
2.2. Cooling circuit
The coolant is pumped from the radiator to the water pump which is driven by the clutch shaft. The
water pump conveys the coolant through cylinder and the cylinder head back to the radiator.
Attention:
The water pump starts working with the engaging of the centrifugal clutch at about
4000 rpm.
The cooling circuit is equipped with a thermostat (opening point 45°C / 113°F). It assures that the
engine reaches its operating temperature quickly and keeps it at a relatively constant level.
The thermostat is integrated in the cylinder head cover.
2.3. Balance gear
The balance gear is mounted on the primary shaft and rotates counter-wise to the crankshaft to
reduce engine vibration.