I do not recall, but this member has a channel and from this video where he documented a 'mechanical issue' he 'fixed' it after contacting American Lifan who told him the clearances. The problem is, he has a handle on YT different than on here, so I have no idea what his thread was named. I guess look it up on the search here. But here is the video for all it is worth. Try American Lifan directly yourself if you cannot find the thread. Sorry for being vague, but I remember it was right in his thread.
https://www.youtube.com/watch?v=hlm6MpMpNIw