Well... I have a 2008 Spyder.. yesterday I rode for 250 miles and experienced this issue 3x with the steering locking up and then the bike steering pushing hard in the opposite direction ( i have not experienced any issue at all before this )... before I tell my story here are some quick facts:
My bike has 2931 miles on it as of the end of yesterday...
I have not had any updates done and in fact I went by the SeaDoo/Yamaha/BRP shop yesterday and found the service manager to be very well informed about recalls and the DPS issues.. my bike currently does not have power steering working properly after driving a demo they had.. I plan on putting the bike in the shop this week for all the updates.. ( I guess it's kizmet that about 2 hours after stopping by the dealer my Spyder shows an issue )
Ok, here was yesterday's scenario..
All 3X this occurred there was a significant cross wind, I'm going between 44 mph and 54mph according to the bike, and was in a very gradual 1/4 circle kind of turn you see on a highway that occurs over a distance like a mile or so... it was at the end of these that steering appeared to lock and then the steering quickly pushed in the opposite direction without input from me.. all 3X I gained almost instant recontrol of the steering by wiggling the handlebars slightly back and forth..
The first time it occured it was a bit unsettling, but from reading this board I almost instantly recognized it was for what it is. I also thought about how I regained control and decided to see if I could get the bike to behave the same way again. I could and it did both attempts afterwards in similar type conditions as described above.. Also my experience might have been minor as compared to others as one.. I'm 275lbs and quite strong, secondarily my power steering is not working normally ( if power steering was working and the bike pushed it's steering against you hard it might have been quite a bit tougher to regain control )..
I had very reticent to take my bike in for any updates until it was crystal clear that the 2008 DPS / Steering Issue was completely resolved for fear of the updates causing a problem... now it's going this week.
I love my Spyder
Mac