Bestell Nr.: 928.000.019


- The cylinder is die-cast in light alloy, it ensures a better thermal stability. 
- The piston, gravity cast at high silicon content light alloy, reduces thermal expansion and the coupling slack. The design of the piston top is specific to optimize the compression ratio. 
- It is provided with a balancing countershaft; this feature cancels the vibrations and guarantees such a driving comfort never felt during a flight and a longer life for the engine itself. The counter-rotating rollers decrease greatly the upsetting torque-steer for an extra comfort in flight. 
- The centrifugal clutch is in oil bath with helicoid mechanical reduction. 
- The electric starting is standard but to offer the maximum safety the engine is also equipped with manual starter with easy system thanks to the flash starter device that speeds up and simplifies the movements. 
- It is equipped with the comfortable closed-circuit system for the recovery of fuel during transportation and the 12 V output for any use. 
Small and compact THOR 250 DUAL SPARK engine has an extraordinary power to weight ratio. 
Advanced technology and high performance of the new THOR 250 DUAL SPARK allow a better feeling of driving performance, making the flight more dynamic, responsive and sensitive, besides ensuring even greater stability. 

The new THOR 250 DUAL SPARK engine adapts to different types of applications including as two-seat trikes, powered hang gliders, one-seat small three-axis, ULM motor-gliders 
Polini THOR 250 DUAL SPARK is a 100% Made in Italy product.