Nick Diaz recommended a pair of hand covers from Vetter, (Hippo Hands) so I looked for some, and finally scored a new pair of them on E-bay for $60.
Nick was right: they REALLY work well. They are essentially huge handlebar wraps with a place to insert your hand. They have slots to fit around your mirror, and exend to fit over the levers, as well.
They block the wind completely, and are lined, so a pair of good gloves inside them will keep you warm. To try them out, I wore them one day when temps were at about freezing point. Rode for half an hour before my hands got cold enough that I needed to stop and warm them, but I was riding bare-handed at the time.
I only used them that one time, though, as they don't fit my bars well, (I don't have Suzuki handlebars).
Because of the way they had to bend on my bars, they put pressure on the inside of my wrists, so I found them uncomfortable for more than a short ride.
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