Answer
Viñales rides an Aprilia RS-GP in the MotoGP series. The Aprilia RS-GP is a prototype racing motorcycle built by the Italian motorcycle manufacturer Aprilia. The RS-GP is powered by a 999cc V4 engine and has a top speed of over 300 km/h. The RS-GP is one of the most competitive motorcycles in the MotoGP series, and Viñales has been able to achieve several podium finishes on the bike.