The 125cc Micro MAX engine is designed for the youngest racers, ages 8-10 years old. As the young racer grows into the more powerful Mini MAX class, a simple upgrade conversion can be performed by an authorized Rotax Service Center.
Technical Specifications
| Age | 8 – 10 years |
| Race Class | Mainly National |
| Horsepower | 6.8 hp (5 kW) at 6,500 rpm |
| Maximum Torque | 5.9 ft./lb. (8 Nm) at 5,500 rpm |
| Weight | Bare engine: 26.0 lbs (11.8 kg), with complete power pack: 47.6 lbs (21.6 kg) |
| Special features | Junior cylinder without exhaust valve, radiator and exhaust that fit special kids chassis |
| Power Pack | Silencer, carburetor, fuel pump, engine, exhaust system, radiator, battery, battery box, cable harness, start button, ON/OFF switch |
| Chassis compatibility | wheel base from 780 mm to 1,050 mm |