Originally Posted by LonerDave
No experience, but have heard that the threes are much smoother than the fours. Suspect it has something to do with 3 going into 360 degrees (120 degrees) so much better than does 4 at 90 degrees. But like I said, never ridden either one.
K75 was a smoother motor because they had to install a balancer that the four cylind r did not require.
3 cylinder/four stroke.
I have a few KMs with one under my ass.