i was riding yesterday and had a weird issue with my sled. It starts great and runs great most of the time, however once we were in some deeper snow and hill climbing for 5 minutes, the sled would have full RPM's and then the RPMS would drop right off and the sled would bog down. I have to let the thorttle all the way off and then I can get good revs again and get moving. It seems to get worse once it starts.
Any helpful hints or suggestions would be great.