How fast does a 12 hp go cart motor?

The speed of a go-kart with a 12 hp engine can vary based on several factors, including the weight of the go-kart, the gearing, and the type of terrain. Generally, a 12 hp go-kart can reach speeds of around 30 to 50 mph (48 to 80 km/h). However, modifications and specific designs can influence these speeds significantly.