I bought the Summit X 670 last winter and only got a couple of chances to ride it. The first time it had water in the fuel from being left outside, but a little gas line antifreeze ran through it and it ran perfectly; had full power, started easily, and would idle on it's own. Now this year I've had nothing but trouble. I got to run it once and it died out on the ride. I got towed and let it sit then after a couple hours it started first pull and ran fine but felt like it was lacking power. Ever since then it's been hard to start, and if it does start then it bogs out after a minute or two if I'm not consistently giving it throttle or pumping the primer. I cleaned the carbs, cleaned the RAVE valves, and replaced my DPM (the old one had fittings broken off, but turns out it wasn't plugged in. New ones not plugged in either, don't know where to plug it in to), ran Seafoam, HEET and rec gas in it. Usually I can get it started once, but after it bogs itself out, there's no use in trying. At this point, any ideas would be greatly appreciated. Should also add, I live and ride in Michigan so I'm not dealing with altitude as an issue, and sleds been in Michigan it's whole life.