Can you post a picture with the rubber boot pulled back so we can see the wire colors inside?
Yes it will cause them to not flash but does not explain the lack of a left rear light. Best thing to do is replace the flasher with an automotive electronic one.bad flasher unit will do the same thing but check connections and grounds first
Thanks for the clue, your problem is most likely in the connections at the front.Everything worked before I removed the front fairing. View attachment 51857
View attachment 51865