The Yamaha Aerox Alpha uses the same 155 cc, single-cylinder liquid-cooled motor as the R-15. It puts out 15.4 bhp at 8,000 rpm and a slightly higher 14.2 Nm at 8,000 rpm.

Yamaha has kept the 155cc liquid-cooled engine in the Aerox Alpha, which still delivers 14.7 bhp at 8,000 rpm. However, the torque has been increased to 14.2 Nm at 8,000 rpm, up from the previous ...