I dont think he did...i think Honda stopped sending their top level riders after the Rossi/Edwards team in 2001.
I think he did about 13 years ago. I'm looking forward to this! I wonder if they can take the fight to Yamaha this year!
After more research, he did in 2003. Crashed out on the second lap due to oil on the track though. http://www.motogp.com/en/news/2003/07/18/nicky-hayden-to-take-part-in-suzuka-8-hour/135075 http://www.superbikeplanet.com/2003-Aug/030801c.htm
Didn't he ride with Seven Stars? I seem to remember pictures of him, the bike and corn rows on the crash truck.
You being a walking double-negative, I'm not sure I know how to take this... If you root for Honda and Yamaha, they're sure to lose, but then you just stated that Kawasaki and Suzuki will race for the win... Did you just make everyone lose?