800 rzr studdering and spitting in cold temp

I picked up this machine about 6 months ago and I live in BC canada it’s average about 38 degrees in the summer all worked fine but now it’s fall up at higher altitude near freezing point the thing spits and caughs works great all day until the temp drops it has a muzzy dual exhaust and snorkel kit and a dynojet power commander 3 I was riding with 2 other stock 800 and high lifter today no problems just mine bogging has anyone ran into this in colder temps thanks johnny