Original Post: February 20, 2017 I've been asked countless times what the stroke length is on my machines, if I can do custom strokes for someone who currently uses a 3.5mm and loves it and ultimately, why I don't do custom stroke lengths on my machines. In short, the stroke length on my machines are right about 4.5mm, I don't manipulate this because it is directly responsible for the tune and stroke characteristics that I've designed into my machines. Let me explain.  Many people are mistaken that a shorter cam offset on a rotary makes for a faster machine. For example...