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ROTAX MAX engines

The ROTAX FR125 MAX engine range is the official engine for ROTAX MAX Challenge. It is the best choice for any kart enthusiast.

Description: ROTAX-single-cylinder | 2-stroke, reed valve engine | oil in fuel lubrication | liquid cooled with integrated water pump | digital battery ignition | pneumatic adjusted exhaust valve | balance shaft | centrifugal clutch | integrated electric starter

ROTAX FR125 Mini MAX Junior MAX MAX
Bore 54,0 mm 54,0 mm 54,0 mm
Stroke 54,5 mm 54,5 mm 54,5 mm
Displacement 124,8 cm3 124, 8 cm3 124, 8 cm3
Capacity 10 kW 15 kW 21 kW
at 8500 rpm 8500 rpm 11500 rpm
Torque 12 Nm 17 Nm 21 Nm
Fuel tank 7500 rpm 8500 rpm 8750 rpm
Clutch Dry centrifugal clutch
Intake silencer Intake silencer with integrated air cleaner
Lubrication Oil in fuel, high quality 2-stroke oil, mixing ratio 2%
Intake restrictor Ï - -
Pneumatic exhaust valve - - Ï
Weight of engine Approx. 12 kg (without accessories)
Accessory kit with Intake silencer, carburetor, fuel pump, exhaust system, radiator, battery, complete cable harness, battery support and battery charger
Optional extras Rev. counter and temperature sensor
Download Replacement Parts List (1.7 MB)
RepairManual
TechSpecFR125MAX_E-2003-04
Reparaturhandbuch
Operator's Manual
Betriebshandbuch