I hve driven this bike many times as my younger brother owns it. Yamaha has launched its more successful running series in the R series edition the R15-S. It was launched bcz of the demand of the people and some negative review about the R15V2. cuz the older version was having a step up split seat and was not that comfortable. so yamaha launched the bike similar to the comparison and perfomance of the R15V2 THE R15-S which comes in 3 different shades DARK GREEN, RARING RED and Invincible BLUE. The S itself says seat. The R15-S has a normal seat like the R15V1 and has the power of R15V2 like bigger tyres bigger dimensions disc, nice and efficient comfort and the powerful Japanese tech 149cc displacement engine and the mileage of 45km/l to 52km/l . Although Every1 was happy by the decision of the yamaha and appreciated it for a sporty family ride. Overall yamaha as usual fulfilled the demand of the buyers and launched a beast. THUMBS UP YAMAHA.