I have an 01 426SM that clicks intermittently from the left side of the engine. Maybe I'm crazy, but it seems to only happen when the bike is leaned over and under power. I can't hear it when on decel, when the clutch is in, or when the bike is still. I think I read that WR engines can be "noisy", but I don't remember ever hearing this before. Any ideas? Thnx!