Hello David, I ride year round and just broke out the heated liner and gloves from Tourmaster. They work well for me till it gets down into single digits F. A 30 minute ride in 0 F at 85 MPH gets chilly quick.
Last winter, one of my gloves started to go bad on me and because it is three years passed warranty, I figured I would need to buy new. However, when I contacted Tourmaster about possible repairs, they simply replaced the set with new. I am very happy with their customer service.
About the road surface, I am very happy with my Exedra Max tires when it is cold or wet. I wrote about my stupidity last December when riding to work on a 30 something degree day in the fog. The bike was taking long deep breaths of air and as I approached a long sweeper that is fine at 85MPH, it hit me that at 105 on wet dark pavement might be a problem. I had no other choice but to ride it out and see what happens. I leaned forward and over the mirror as I pulled Brahma down into it. The tires stuck just fine and I held the line with no drift. I bring this back up as I believe the tires are what saved my dumb butt that morning, not any skill I think I have. Maybe your tires on the Rocket could use a swap. I have the R3T so my rear tire is smaller than yours yet bigger than your Valkyrie.