stuck in 3rd gear

[LEEHENRY]

the bike is an R1200ST with 12,000 miles on the clock. On a recent trip, during about one in ten run ups through the gears, I absolutely could not upshift from 3rd gear. Could down shift to 2nd, then back up to third but again, could not upshift to 4th. I was careful to completely pull in the clutch and yank up the shifting toe hard - but still would be stuck in 3rd. Would have to pull off the road, stop, down shift to 1st, then start over - for the next 9 or so times, all was ok. Then pow, stuck in third again.
Any ideas from you experts? Clutch adjustment? Transmission problem?
Thanks much for any suggestions,
Lee

 

[deilenberger]

Sounds like a transmission problem. Hopefully you're still under warranty. Sounds like shift forks are worn/bent..

BTW - moved the thread to the hexhead forum - since that's what your bike is..