don't be afraid to use duct tape, I found, riding my V-strom in subzero °f, @ 60mph, a pinhole draft, feels like an ice pick, I have wrapped myself in duct tape more than once, my jacket to my pants, my pantlegs to my boots, and gloves to my sleeves
I like my WindStopper balaclava, and chin curtain is important on your helmet, open chin is noisey, and colder