Scottie and I were out on the GT all afternoon. Beautiful day here in Virginia, never really got past 50. We got some strange comments and a lot of "brrr" looks about how "cold" it is to be on a bike. Now it was hat as shit inside but on the bike the Santiago's, some Patagonia thermals and some fleece was great on the bike. The +4 +3 CB windshield keeps the wind off pretty well (with exception of truck's "wakes" as they push by).
I think a Gerbings vest and I could ride all year. 40's is pretty comfy. The flip up helmets need to be replaced with a solid helmet much colder and some warmer gloves... Just ride man! I think even when you're the only bike on the road, when it's cold people notice you more on the bike and make space because they'e thinking we're freaks for being out there in the weather.
Ride, ride, ride. Who cares if it's cold!!!