You see, we are all different. The motor noise or how "silent" is, it's number one priority for me. That's why I don't ride dirt bikes.Never got the whole noise thing personally, if the a bike rides great and makes a bit of noise, who cares? Buying a bike because one motor is more silent than another is the last quantum i would use on deciding a bike purchase, first and foremost is getting a bike that fits, you like the geo, and is fit for the type of riding you do. If your lucky there will be a couple of options form different manufacturers and then you can start to compare motors etc, but no pint buying a bike because it has a certain motor even if its completely wrong for you and your riding.