Recently I parked the Busa and smelled something like gas no maybe exhaust gas (unburnt gas/fumes) coming from the clutch side radiator area. Now I was about 4 hours from home and I know not to go tearing into something that can wait so I did a little inspection. Lifted the tank and started bike. Did not see any gas leaks....that's good! I couldn't hear any exhaust gasket leaks , you know the pfftting sound. Nothing there. A couple of hours later the smell almost went away. I have only smelled faint whiffs nothing heavy since then. It is all stock including the pair valve. If it was a car I'd say it smelled like unburnt hydrocarbons...or a faulty crankcase breather. Any ideas on what to look for?