If I get a bit too touchy feely with the gear lever and don't positively put it into top it sometimes jumps out and back into 4th by itself. Scares the living suitcase out of you when it happens. And the sound 'aint too pretty either. Solution: WHACK IT INTO 5th LIKE A MAN! SHOVE THAT THANG IN THERE! No sissies allowed.

I'll just leave this here. https://goldwingdocs.com/forum/viewtopic.php?t=36733 and http://www.justwings.com/Cause.html

According to that they sorted the issue from 2014 so shouldn't be that. I'm gonna go with more assertive changes into 5th and see how that goes. Operator error is my guess at the moment. Thanks for the link tho...

This has been my issue as well only that it doesn't just pop out of 5th whenever but usually just after I've shifted.

You definitely have to 'put your foot in it' to resolve this.

It never happened to me on my Valkyrie and only once on my 2013 F6B with 45,000 miles on it.

I haven't had any issues with the tranny going "out" of gear and into a lower one, thankfully. What I have noticed, however, is if I'm wearing boots that have a "tall" toe area and I've got that toe under the shift lever to be ready for the next upshift at some point, I sometimes accidentally/unintentionally apply too much upwards pressure and find myself jerked into the next upper gear. Annoying, and operator error for sure, but not nearly as attention-getting as an unexpected downshift. Hate when that happens.

Starting to think this is more a “was never properly in gear” than a “jumps out of gear” problem. I’ve adjusted the way I change and will see.

Had this happen a couple of times on my new 8000km Valk. (Imported from your hometown actually Geepers) I really hope it is just because wasn’t positive enough on change. Last one I remember clearly. I really feel I was a bit wussy with the gear selector. got itself into a false neutral after I tried go from 5th to 4th, Then it tried to jump back into gear with a crash. If it finds a false neutral again I will get the clutch in next time.

I did it once but it just ground a little before going in. perhaps it was my fault as i was teaching a hot rod hardly a lesson on acceleration when it happened and i was shifting fast .

Sounds like it might be a common experience - ie that you can "feather in" all the other gears but have to be more positive with 5th. I'm going to slow down this shift just a fraction and also be more assertive with it. I'm also going to "hold the gear lever up" in 5th while l let the clutch out. I don't normally do that but will start doing it with 5th and see. I would say the shift into 5th is the mosts vague of all the shifts on my bike. You never quite get that definite "through the gate" feeling you do with the other shifts. Anyway, trial and error I guess until you find something that works. We all shift so differently it's hard to have a "one rule fits all". On a side note, I emailed my dealer (where I bought the bike new) a couple of days ago and asked for his thoughts on this issue. Stony silence so far. Will report back with what he says (if he ever does).