tests the acceleration of the Yamaha R15-S which is based on the Version 1.0 of the 150cc motorcycle. The sporty single-cylinder motorcycle can now accommodate a pillion without much of a hassle and is priced slightly cheaper than the R15 V2.0 which also continues to be on sale.br br The Yamaha R15-S gets a unibody seat and S in the name stands for Seat. It competes with the Honda CBR150R and the Pulsar RS 200.