The brand new Polini THOR 250 features a liquid cooling system, that grants an extraordinary steady power output and better performance at every rpm.
The die cast light-alloy aluminium cylinder grants a better thermal stability. The liner with Nickel-Siliceous coating improves the piston sliding, its resistance to wear and abrasion. The piston, gravity cast at high silicon content light alloy, reduces thermal expansion and the coupling slack. The piston top design is specific to optimize the compression ratio. The advanced technology and the great performance of the new THOR 250 gives a better feeling when driving making the flight even more performing, dynamic, reactive, beside granting more stability.
2 stroke monocylinder
Bore for stroke
72 x 60
36 HP at 7500 R.P.M.
Aluminum with Gilnisil coating
Two chromium plated rings mm 1
Reed valve in the crankcase
Electronic and with battery charger possible
Battery charger prearrangement
Output power 80 W at 5500 RPM
Spark plug hood
5k Ω resistance
Lead free petrol with 2% synthetic oil
Gear reduction unit
Helical teeth in oil bath with 2,8 reduction ratio
Starting (Electric starter optional)
Pull start with self winding cable FLASH STARTER
Centrifugal in oil bath
Expansion with oval silencer
18 Kg (19kg with electric starter) without radiator