Rotax 125 Max Mini (Engine Only)

For those who need an extra engine but already have all the accessories.

The engine is delivered without carburetor, radiator, electrical system, exhaust, airbox, battery, charger etc.

The Rotax 125 Max Mini is the perfect next step for drivers moving up from the Micro MAX class and continuing their development in kart racing. With 13 hp, strong torque and a smooth power delivery, this engine offers an excellent balance of performance, control and reliability for both practice and competition.

For more than 40 years, Rotax has developed some of the world’s most popular kart racing engines and is today a market leader in multiple racing categories. Every engine is hand-built in Austria with a strong focus on quality, durability and performance.

Rotax is also the only manufacturer in the world offering a factory warranty on racing engines – clear proof of the outstanding quality and reliability these engines deliver.

Technology:

With the Rotax 125 Max Mini, you get a modern kart engine developed for young drivers and leisure or competitive karting:

• Powerful yet easy-to-drive 13 hp engine
• Digital electronic ignition controlled by the engine ECU
• Excellent reliability and long service intervals
• Hand-built engine manufactured in Austria
• Perfect development engine for the Mini MAX class
• Compatible with chassis using a 950 mm wheelbase

Engine components:

Crankcase: The crankcase is manufactured from high-pressure die-cast aluminum for maximum strength and precision. After casting, all surfaces are CNC-machined to ensure perfect tolerances and high quality.

Piston and cylinder: The cylinder is manufactured from aluminum and CNC-machined for maximum precision. The Junior cylinder is designed without an exhaust valve, providing a smooth and controllable power delivery.

The cylinder bore features a Nicasil coating that provides exceptional wear resistance and long service life. The piston is made from forged aluminum and surface treated to reduce friction and improve durability.

Cooling: The engine uses an efficient water-cooling system that maintains stable operating temperatures even during long sessions and demanding conditions.

Ignition: The digital ignition system is fully controlled by the ECU and works together with crankshaft sensors to ensure precise ignition timing at all engine speeds.

Clutch: The maintenance-friendly centrifugal clutch efficiently transfers power to the drivetrain and is designed for long life with minimal maintenance.

Carburetor & fuel system: The engine uses a Dellorto carburetor together with a vacuum-operated fuel pump for stable and consistent fuel delivery. The intake system is designed for optimal airflow and efficient filtration.

Specifications:

• Displacement: 125cc
• Power output: 13 hp at 7,500 rpm
• Torque: 13 Nm at 6,000 rpm
• Weight: 11.8 kg (Engine only)
• Complete engine package weight: 21.6 kg
• Ignition: Electronic ignition
• Cooling: Water-cooled
• Chassis compatibility: 950 mm wheelbase
• Class: Rotax Mini MAX