Gary - my '06 has a manufacture date of 06/06. Yesterday I met some folks at WFO and rode to about 8K ft. of altitude. One couple's '03 failed at the Provo Falls overlook (dreaded ignition switch failure) so I had a passenger on the way down. I had the surge after we dropped a thousand feet or more and it bucked as badly as it has since I bought it a year ago. When we stopped, my passenger asked:
"Was that the surge?"
"Yeah. Nice, eh?"
"That's really bad."
"You know it."
FWIW, my s/n is in the mid 1700's and my CO settings were/are 5,18,18,21 (I've since added a PC-III w/stock map and O2 disconnect - no real improvement on "the surge" but slightly better driveability around town). Someone mentioned a few days back that instantaneous fuel mileage was a good indication that the ECU was confused. Mine read between 70 and 80 on the way down until the surge hit. Then it dropped into the 20's (downhill in 5th gear).
I don't know if they care but as it stands today it's tough for me to imagine myself buying another Yamaha product.
Forgive me, but I plan to re-post most of this under General FJR.