K&N .............again......

[Dom]

OK, I parked my bike outside Friday night in the rain and rode all day yesterday in the rain with no problems performance wise to speak of.  

Another measure you could take for protection from the rain could be a precharger, which is fine plastic mesh shower cap looking thing that you stretch over the filter.  I remember someone saying that they couldn't find one specifically for the lunchbox(ru-2970), but you could always call K&N.  That's actually what the precharger is made for, keeping excess dirt and water out of the filter on vehicles where the carbs are exposed.