Thor 250

Thor 80 Thor 130 Evo Thor 190 Evo Thor 200 Evo Thor 250
Engine 2-stroke monocylinder 2-stroke monocylinder 2-stroke monocylinder 2-stroke monocylinder 2-stroke monocylinder
Cooling Liquid cooled Forced air Forced air Forced air Liquid cooled
Bore 50 × 44 54 x 54 64 x 60 64 x 60 72 x 60
Displacement 86 cm3 125 cm3 193 cm3 193 cm3 244 cm3
Power 17,2 HP 21,5 HP 28 HP 30 HP 36 HP
RPM Max 10.450 8.800 8.000 8.100 8.000
Cylinder aluminum with Gilnisil coating aluminum with Gilnisil coating aluminum with Gilnisil coating aluminum with Gilnisil coating aluminum with Gilnisil coating
Compression Ratio 14:01 12,5:1 12:1 12:1 11,5:1
Piston Two chromium plated rings (mm 1) Two chromium plated rings (mm 1) Two chromium plated rings (mm 1) Two chromium plated rings (mm 1) Two chromium plated rings (mm 1)
Intake Reed valve in the crankcase Reed valve in the crankcase Reed valve in the crankcase Reed valve in the crankcase Reed valve in the crankcase
Carburetor CP Polini Ø21 – Walbro WG8 Walbro / Polini Float Ø24 Walbro WB37 Walbro / Polini Float Ø28 Ø28 Bowl
Air Filter Air box Air box Air box Air box Air box
Ignition Electronic Electronic with battery charger possible Electronic with inductive discharge Electronic with battery charger possible Electronic with battery charger possible
Battery Charger Prearrangement N/A Output power 80 W at 5500 RPM Output power 80 W at 5500 RPM (with electric starter only) Output power 80 W at 5500 RPM Output power 80 W at 5500 RPM
Spark Plug Hood 5k Ω resistance 5k Ω resistance 5k Ω resistance 5k Ω resistance 5k Ω resistance
Fuel Type Lead free petrol with 2% synthetic oil Lead free petrol with 2% synthetic oil Lead free petrol with 2% synthetic oil Lead free petrol with 2% synthetic oil Lead free petrol with 2% synthetic oil
Gear Reduction Unit Helical teeth in oil bath with 3,58 reduction ratio Helical teeth in oil bath with 3,43 reduction ratio Belt transmission with 2,83 reduction ratio Helical teeth in oil bath with 2,8 reduction ratio Helical teeth in oil bath with 2,8 reduction ratio
Starter Pull starter with self-winding rope.-FLASH STARTER Pull start with self winding rope Flash Starter Pull starter with self-winding rope. Pull start with self winding cable Flash Starter – Electric starter (optional) Pull start with self winding rope Flash Starter – Electric starter (optional)
Clutch Centrifugal (wet) Centrifugal in oil bath Dry centrifugal (for model with clutch only) Centrifugal in oil bath Centrifugal in oil bath
Muffler Expansion with aluminum silencer Expansion with aluminum silencer Expansion with aluminum silencer Expansion with oval silencer Expansion with oval silencer
Engine Weight 11,4 Kg / 25.13 lbs 13,8 Kg / 30.42 lbs 13,6 Kg / 29.98 lbs – 14,4 Kg / 31.74 lbs clutch – 14,9 Kg / 32.84 lbs elect. starter – 17 Kg / 37.47 lbs clutch+elect. Starter 17,5 Kg / 38.58 lbs (18,5 Kg / 40.78 lbs with electric starter) 18 Kg / 39.68 lbs (19kg / 41.88 lbs with electric starter) without radiator
Propeller Rotation Clockwise Clockwise Counterclockwise Clockwise Clockwise
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