The Honda CRF150R is a motocross bike featuring a liquid-cooled, single-cylinder, four-stroke engine with a Unicam, four-valve, 149.7cc displacement. It's available in two trims: the standard CRF150R and the CRF150R Expert, which has larger wheels and a longer swingarm. The engine uses a Keihin 32mm flat-slide carburetor with a Throttle Position Sensor (TPS). The transmission is a close-ratio, 5-speed manual with a wet, multiplate clutch.