Do you get a snow tire discount on your motorcycle insurance?
Haha, no. But if the insurance company insists on charging me through winter, and actively penalizes me if I try to stop my insurance over winter, then screw 'em, I'm riding' and they can suck it up.
That said, I've never claimed any winter damage, and haven't had an off in winter in about 10 years, despite ~25000 calendar-winter kilometres ridden in those 10 years. So it isn't like I'm a statistic that's raising our collective rates.