Spitting out of 5th by itself is where the term "Ghost Shifting" evolved from.You didn't do it so it must of been a Ghost..:shrug:
As someone said.a dealer will try and say you must of not shifted properly.But that was when Honda was saying "we haven't heard of that before".That was years ago,and now Honda has a direct line (punch #2 for Goldwing) that deals with the 1800 issues.
Because they are having to deal with a small percentage of tranny issues not a handful when this first surfaced year ago.
I suggest you take the bike in anyways and have the mechanic test ride the bike.even though he will more than likely at this point say "I couldn't get it to do it."
Then call Honda customer support each and every time it does it again,and it will too!
http://powersports.honda.com/questions/customer.aspx
It doesn't hurt to have the same guy test ride it after you experience it again either.Even though he won't fin it.It's creating a trail of events that will help YOU later on down the line should it totally fail.
Honda will log all your complaints each and every time.When you talk to a support person-Ask for their name and "Direct line 5 digit extension" It saves you from all the double talk each time you call them back.
When you call the above number you are asked is you know the parties extension-Press 8-you then enter the extension and go directly to the same person you are dealing with!
I just got a new engine because I documented each dealer experience,and reported the dealers lack of identifying my issue.Honda was aware from the start and stood behind my blown up gear box in spite of the dealer saying to my face-This is not normal and shouldn't have happened unless you were in high RPM's to do that much damage".
So is anyone has any issues with a ghost shifter.Then get it tested out at a dealer and then place the call to Honda if you are in warranty/ex-warranty.It's a CYA policy that works!.