I’ll keep this short and to the point. Check your tire pressure. With the cold weather, or just the fluctuations in temperature (70s, then 40s, then 60s) your tire pressure might need a look-see.
Also, in the cold weather your neck may get cold fast. Your head too, but I seem to have more problems with my neck. If your jacket (winter) has a big neck cover, that’s good. But if not, get something to cover your neck. I’m gonna try rockin a baclava (bought it for snowboarding) and neck warmer combo and see how that goes. Remember that as you scooter along the wind chill does a number on ya. Ride safe!