I read the entire biker dialogue and... well... I didn't really see what all the hubbub was about.  Perhaps I missed something?  It seems that the buyer (you?) got buyer's remorse at some point and started attacking him out of nowhere.  Other than that, I don't see any issue with biker or anyone else from the team selling their XFUEL for XBY. Is there some issue with that which we should all be aware of?