I've got the same sled exactly as you do bud, same length track, same can, there are definitelly a couple things you can do to clean that up. One problem is in clutching. And another is the oil pump over oiling in stock trim. I've read that the stock can seems to work about the best on the m7, but I can't notice a difference between stock and my MBRP, they both loaded up and crapped out on bottom before I tweeked on a few things.
I've reclutched mine which was huge, and am now am out two turns on the oil pump rod, and still burning a bit to much oil. Kinda starting to feel like my oil pump might be sticking a bit also. But each turn on the rod, I noticed the bottom end cleaning up. Since I have tweeked a few things, I've got it really cleaned up, the only time that it even gurgles a bit now is if I cruise down the trail in lowerer RPMs, and don't vary the throttle at all for a while, and then get back on it. PM me if you want some pointers on stuff to try on your clutching if your up for it.
Good luck