Just checked the silencer, it's got 18 12 - 7 718 396 stamped on it which is OEM fitting for 2013 to 2016 I believe. As for the bike, I find the power sufficient, the front end dives too easily, seat comfortable, bars a bit buzzy especially in traffic, gearbox can be graunchy esp 2nd to 3rd, and neutral impossible, doesn't like bad road surfaces ( I live in London!), handling fine. I like the toys, such as the tyre pressure alert, already saved me when I picked up a sharp in the rear tyre. So far about 8 out of 10, but we've had with snow or rain most of the time since I got it, so not huge amounts of riding yet. Seems a well - built, competent ride.