Its top speed is 120kph. Originally its 115cc. Now its upgraded to 150cc . Mods: RGS Chrome bore block 150cc (ported & polished) lightened valves AP power pipe Clutch Clutch spring Clutch bell upgraded sprocket Changed roller weights to 9 each changed jettings replaced coil denso iridium spark plug External mods: too much to list. My setup is more for touring. I know its small but no problem going 160km roundtrip.