Q. Is it possible to reset the odometer of Yamaha YZF R15S? If possible how you detect original kms driven?

If I am not wrong, then you are enquiring about ODO faulty reading. Its not possible to reset the ODOMETER, but in some cases it is possible to some extent to get faulty readings, for example, if the owner has disconnected the odometer wire and then reconnected it before selling then that sort of tampering is possible (which is illegal also). If the meter itself is faulty then also the ODO readings will be faulty. Lastly, if the owner had replaced the Digital gauge on some occasion and didn't clock the previous reading on the meter before installing on the vehicle then also such faulty reading will be evident. But there is no possible way to determine the actual KMs driven on a vehicle.

I have heard we can alter odometer in cars only, bikes I don't think we can do it,bcoz there no possibility of memory chip in bikes. But, it is better you consult the showroom to find if there is any possibilities of such

Yes can be reset via computer...