Yamaha R1 powered Go Kart | Custom Yamaha R1 we have seen enough Custom Yamaha R1 in the past. This builder went in a different direction with his Custom Yamaha R1 project. What do you expect when you harness a Yamaha YZF-R1 Engine to a custom Go Kart. well a crazy Go Kart that clocks a topspeed of 290kph / 181mph. Yamaha R1 powered Go Kart features a custom frame, custom exhaust system, custom air intake, etc.