Rotax Senior Max Engine

Description

The Rotax 125 Senior MAX EVO is the top single-speed engine of the Rotax MAX EVO range, for drivers aged 14 and over with racing experience and for committed leisure drivers. Its cylinder has the electronically controlled E-RAVE exhaust valve, giving 30 hp at 11,500 rpm. Supplied in the UAE by an authorised Rotax dealer in Dubai.

Key specifications

• Class: Senior MAX, single-speed (non-gearbox); Rotax lists it for leisure, club, national or international racing; CIK-FIA approved 125 MAX series
• Driver age: 14 years and over (Rotax guideline; age limits can vary with national regulations)
• Maximum power: 22 kW / 30 hp at 11,500 rpm (ISO 15550 / ISO 4106)
• Maximum torque: 21 Nm at 9,000 rpm
• Engine: 125 cm³ single-cylinder two-stroke, reed-valve controlled inlet, mixture lubrication (oil pre-mixed with fuel)
• Exhaust valve: E-RAVE (Electronic Rotax Adjustable Variable Exhaust), electro-pneumatic, ECU-controlled, using crankcase vacuum; closed at idle and below its opening point of approx. 8,000-9,000 rpm
• Cooling: liquid; water pump driven by the clutch shaft, thermostat in the cylinder-head cover opening at 45 °C
• Carburettor: Dell’Orto VHSB 34, slide type with float chamber; fuel pump driven by crankcase pulses, with inline fuel filter
• Ignition: ECU-controlled, timing calculated from an engine speed sensor; no manual adjustment required or possible
• Starter: electric, relay-switched, with automatic START-to-ON reset
• Clutch: centrifugal, running in an oil bath; disengaged below 2,500 rpm, fully engaged at approx. 4,000 rpm
• Balance shaft rotating counter to the crankshaft to reduce vibration
• Exhaust: tuned resonance system with after-muffler; intake silencer with multi-layer air filter
• Electrics: 12 V battery; Rotax quotes about 100 starts or 5 hours of running from a fully charged 12 V 6.5 Ah battery
• Weight: bare engine 12.0 kg (26.5 lb); complete power pack 23.1 kg (51.0 lb)

Compatibility

• Chassis: 1,040 mm wheelbase
• Rotax Evolution concept: upgrade from the 125 Junior MAX EVO; the gearbox alternative is the 125 MAX DD2 EVO

In the box

• Engine
• Intake silencer with air filter
• Carburettor and fuel pump
• Exhaust system
• Radiator
• Battery box with cover
• Cable harness
• OFF/ON/START switch and relay

Contents of the Rotax complete power pack. The battery is not listed in the Rotax power pack.

Genuine Rotax engine, code ROT – SENIORMAX, supplied by Scuderia General Trading, authorised Rotax dealer in Dubai. In stock at our Dubai warehouse where shown; orders are dispatched the same day they are received, with DHL Express delivery across the UAE and the GCC.