It all started about 6 weeks ago when the roads had a definitly greasy feel to them, backed up by The Hobbit. However, a few days rain sorted that out, but they still felt greasy. Hmmm...check tyre pressure, a few PSI under corrected to book value. No change. A few PSI more and no affect. Now, I'd say it was me, but The Hobbit reports doing exactly the same think to his Kwak 750 with similar lack of result. The ambient is around 8C, both bikes ('Bird and kwak), feel the same but didn't until recently. Roads clean and dry. What could be causing this?