My new Yager 200 "shudders" a bit when you start off from a stop. When I twist the throttle, the bike revs to around 3k rpm as it begins to move... and at this point it shakes or "shudders" a bit as it takes off.
It doesn't do it around 3k rpm if you are already moving. I assume it's normal, and it isn't that bad, it's just kinda strange. I seem to remember my Vino 125 behaving similarly, but I'm a bit spoiled by how smooth my other bike, a Yamaha Morphous, is.