It may have stalled due to a leaner mixture caused by the cold dense air.
I hide in the shop anywhere south of 55 degrees, I've ridden enough stuff in enough "stuff" to not ride in it anymore.
It snowed 24" on Fri. Then it's going to start again here tomorrow through Thanksgiving.
I will cajole Cruiser when it's 103 degrees and 99.999% humidity there in the V.I. and it's a balmy 75 and sunny here....