So with all this fresh pow we got i was out riding in like 3 feet of powder and my sled starts to run like chit a soon as i hit the snow and start to work it a little. Wont pull any rpms and boggs out down to the point its like its running on one hole. i taped off all my vents and even if i keep my intake clean no diff. I can take it out on the road clear it out and it runs like a top till i hit the pow and work the sled. I cleaned the clutches changed my weights and it still runs like chit. It seems to load up really bad, worse under load. Even if i stop in the snow and try to go a gain it just bogs out. I took it out for a good run down the road a opened it up, pulls good once you get it cleared out. pulled plugs they a black and crusty with would point me to think its really rich, but i jetted it for like 0 to -15 C and it was like 30 below last night i find it hard to belive its really running that rich. Now i have been reading that when these oil pump start to go they start dumping the oil in which is what i think is wrong cause it smokes 10 times worse that my 600 like to the point you cant stand by the sled unless you moving. has any one seen this before. I am at wits end with dam thing an need i running top notch by the 30th.