Seadweller wroteThink I answered my own question...😝
Seems the 05 series was for markets with higher emission/noise standards than the 04, so it went to states like California, and likely many countries in Europe.
I don't know for certain but I think you're correct here, the Swiss were very stringent on emissions but also extremely hot on noise.
I've heard of riders being turned away at the border because the officials thought their bikes were too LOUD!
Steve R