The Yamaha RX King is a 135cc two-stroke motorcycle built for the Indonesian market from the early 1980s until 2009, where it earned a cult following as the king of the road. Its loud exhaust and quick acceleration made it a street icon, and ngebut is Indonesian slang for speeding. Clips of RX Kings revving and flying past became common in Indonesian motorbike communities on YouTube and TikTok, and this recording spread as a reusable sound for racing jokes and edits far beyond its original ride video.