I looked for an answer to this question on here but I couldn't find a satisfying answer. I recently bought a new yz450. I came up on a video on YouTube saying that improper kickstart techniques can cause the engine to kick back. It also said that if that happens, that it could cause engine damage. This has happened to me before and I think I know now how to do it correctly however I would like to know more information about this. If anyone here knows what sort of engine damage this might cause, would someone be as kind to shed some light about this topic? I am wondering what all could happen to the engine if it kicks back? How do you know if you did cause damage? ETC... I feel a little worried knowing that I was doing something wrong from day 1 and I am a little paranoid now about that. Thank you in advance.