ENGINE 125 JUNIOR MAX EVO

Description

The Rotax 125 Junior MAX EVO is the Rotax engine for experienced young drivers aged about 12 to 15 who race at national and international level. It moves up to the full-size 1,040 mm wheelbase chassis and 23 hp, with a junior cylinder that has no exhaust valve. Supplied in the UAE by an authorised Rotax dealer in Dubai.

Key specifications

• Class: Junior MAX; Rotax lists it for leisure, club, national or international racing; CIK-FIA homologated 125 MAX series
• Driver age: 12 to 15 years (Rotax guideline; age limits can vary with national regulations)
• Maximum power: 17 kW / 23 hp at 8,500 rpm (ISO 15550 / ISO 4106)
• Maximum torque: 19 Nm at 8,500 rpm
• Engine: 125 cm³ single-cylinder two-stroke, reed-valve controlled inlet, mixture lubrication (oil pre-mixed with fuel)
• Cylinder: junior cylinder without exhaust valve
• 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 11.8 kg (26.0 lb); complete power pack 23.0 kg (50.7 lb)

Compatibility

• Chassis: 1,040 mm wheelbase
• Rotax Evolution concept: upgrade from the 125 Mini MAX EVO; next step 125 Senior MAX 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 – JUNIORMAX, 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.