Hello, today I’m giving review about Yamaha R15 v2 bike, first of all if you are looking for a comfortable bike thn Don’t go for R15. Seriously it’s my personal experience I had R15 bike & it’s totally uncomfortable bike I have ever ride. I agree that R15 looks are pretty awesome & it’s not just a bike its a girls magnet bike if you know what I mean. But still all of this it is uncomfortable, & I can’t ride this bike for more thn 2 hours continously I don’t know if its just me or with everyone, its riding position is not so comfortable, plam of my hands hurts really bad when I continously hold the grip of handle. Now lets talk about the back seat, i’d say you are all depend on the rider I mean if the rider speeding thn you have no control on ur self its like back seat person have to control him self with force because there is no grip for back seat person all they can do is to hold the rider or fall on the rider. My shoulders really hurt bad wen I ride this back no matter if you are alone or driving with someone else on the back seat.