Re: '05 S2R 800 stuck in 2nd gear...???
Greg, I had this exact same problem on my 07 695. It happened three times in three days and took the shop almost 3 months to fix (FYI, not the shop's fault it took that long, DNA was dragging their feet). There ended up being a broken "shim" in the shift drum along with the drive shaft (I think, it had something else to do with shimming) was at least 3mm off of what it should have been.
The shop replaced all the outer components first and that didn't fix it. They eventually took the cases off and basically replaced a bunch of the transmission. I continued having weird shifting problems until I sold the bike back and bought a different one.
Long story long, I don't think it'd be an easy thing to look at cause they had to get into the gear box and shift drum and such. But, if you're willing and strong of heart, go for it.
If you'd like the exact details of what the issue turned out to be, PM me and I'll pull my maintenance records.