I have a 2002 800 xc sp with the FAST M10. I lost the clutch side cylinder while riding in northern MI. I was extremely cold -12 actual temp. When I tore the motor down, I saw that the piston rings melted and ended up on top the cylinder, melted. There was some noticeable damage to the cylinder wall, as well. This cylinder, for the past 2 years, had a lot of oil coming out of it through the exhaust and on the exhaust valves. What would the excessive oil indicate that might lead to the burn down? Thanks in advance for any help.