Following on from the Speedo Defect thread, I thought I'd break mine down to give you an idea of the climate protection measures that Honda has taken.
Removing the speedo was as simple as undoing the two hex head cap screws, unclipping from the handlebar, pulling back the connector boot and releasing the connector by pushing on the lock tab.
With the speedo off the bike, we can see at the back there are three drain holes in the outer case. Two are for vertical orientation when the bike is being ridden (sensibly
). The other one id to allow drainage when the bike is parked on the sidestand.
Looking at the inside of the outer case we can see the drain holes quite clearly.
Now we can see the back of the inner case. The only thing of interest are the three breathers/vents and the connector. Note the locking keys on the right hand side of the block.
With the inner case removed the circuit board that drives the display is exposed, and in the inside of the case you can see three white dots. I think these are a barrier film that allows humidity to escape out, but will prevent water drops from getting in through the vents.
And now we're stripped as far as I want to go at this time. You can see my LCD is nice and clean and no signs of the anti-fog treatment streaking.
I've enhanced this shot to show the sealing gasket that surrounds the LCS and other display elements, so I'm confident that no water can actually get in there but humidity could possibly build up from the ambient air that would get drawn in as the speedo housing alternately heated up and cooled.
So there we are, I hope it sets some minds at rest regarding the "waterproofness" of the speedo and explains why some of the displays are affected by the streaking.