Kawasaki Ninja 250SL

The Kawasaki Ninja 250SL (codenamed BX250), also called Ninja RR Mono in Indonesia (until November 2016, later changed to 250SL), is a motorcycle in the Ninja sport bike series from the Japanese manufacturer Kawasaki sold since 2014. The bike replaces the 2-stroke Ninja ZX-150RR (also called Ninja RR) that was produced from 1996 to 2015. It is powered by a 249 cc (15.2 cu in) single-cylinder engine from the KLX250 that produces 28 PS (20.59 kW) @ 9,700 rpm and 22.6 N·m (16.7 lb·ft) @ 8,200 rpm mated to a 6-speed constant mesh transmission.

It is the first Ninja sport bike to have a 4-stroke single-cylinder engine.