I completed the following sequence:
1. thawed out the sled overnight in garage.
2. started sled, confirmed sled only firing on one cylinder.
3. removed plugs, burned off residue with torch.
4. replaced both plugs (after cleaning).
Sled fired right up breathing on both cylinders. Ripped around the property, appears to be running fine now.
I was riding just above sea level when it choked yesterday. I wonder if the fuel mapping is a skosh rich for Alaska and our lower elevations in Southcentral.... So far here is my honest quick and dirty pros/cons of the sled:
Pros:
Motor pulls hard (even when in break in)
Suspension works really well, and is pretty effortless to ride.
I'm not ridiculously sore after my first ride of the year.
3" track pulls like a freight train (especially combined with the A-1 suspension), even in snow with no base.
Cons:
Clearly runs rich enough on break in to foul a plug.
Little things like insulation coming loose under the cowl and getting annihilated by the clutch