Timbo, your running 71 gram weights? wow, was that around Edmonton? I am from Whitecourt and run 66 around here. Good to here its running good! I had a 03 700 rmk mod with 754 wisecos in it. Ran awesome, sold the sled to a buddy 2 years ago and still going strong. I wouldn't be afraid of them, I...
The can won't make a difference with the pcv. I have a 09 800 also with 900 miles on it and a pcv. Pull your exhaust valves and have a look at the pistons. If they are scuffing at all on one or both sides its just a matter of time till you have a failure. I am going to order "the fix" for mine...
I have the same sled. You must be off warranty? I have been running a power commander this season and it works very well, no bog or anything. It pulls very hard too. Your clutches must be out of allignment to blow belts like that. It is pulling cords on one particular side?
I have tried running lighter weights in the mountains, never made a difference. The problem with my sled is not getting full rpms, the reflashes and lighter weights didn't work.