BRP Rotax 125 MAX evo - Engine Design and Technical Description

Op
erator’s Manual ROTAX 125 MAX evo, Junior MAX evo, Mini MAX evo, Micro MAX evo
Pa
ge 34/58
Ed
ition 09/2016
Tabl
e of Contents of Operator’s Manual
1. Design of the ROTAX engine types 125 MAX evo, Junior MAX evo, Mini MAX evo and
Micro MAX evo ............................................................................................................................ 35
2. Technical description of the ROTAX engine types 125 MAX evo, Junior MAX evo, Mini
MAX evo and Micro MAX evo ..................................................................................................... 35
2.1. Type of engine ............................................................................................................... 35
2.2. Cooling circuit ................................................................................................................ 35
2.3. Balance shaft ................................................................................................................. 35
2.4. Ignition unit .................................................................................................................... 35
2.5. Electric starter ............................................................................................................... 36
2.6. Electro-pneumatical exhaust timing control (125 MAX only) .......................................... 36
2.7. Fuel pump ..................................................................................................................... 36
2.8. Carburetor ..................................................................................................................... 36
2.9. Intake silencer ............................................................................................................... 36
2.10. Exhaust system ............................................................................................................. 36
3. Media for engine operation ................................................................................................. 37
3.1. Coolant .......................................................................................................................... 37
3.2. Battery and battery charging unit ................................................................................... 37
3.3. Fuel ............................................................................................................................... 39
4. Engine tuning ...................................................................................................................... 40
4.1. Carburetor calibration .................................................................................................... 40
4.2. Selection of the transmission ratio ................................................................................. 45
4.3. Exchange of the clutch drum with chain sprocket fitted .................................................. 47
5. Change or renewal of the chain sprocket on the clutch drum ......................................... 48
6. Operating limits ................................................................................................................... 49
7. Engine start and operation ................................................................................................. 50
7.1. Starting the engine ........................................................................................................ 50
7.2. Stopping the engine ....................................................................................................... 51
7.3. Running-in procedure for the engine.............................................................................. 52
7.4. Setting of the exhaust valve timing (125 MAX evo only) ................................................ 52
8. Maintenance schedule for engine components ................................................................ 55
9. Transport of the kart ........................................................................................................... 57
10. Preservation of engine and equipment .......................................................................... 57