I have a 2006 Artic Cat Z 570 LX snowmobile (2 stroke/oil injected) that sat for 5 years. The gas smelled like varnish, so I drained the gas tank, cleaned the tank and replaced the fuel line in the tank as the line was disintegrating. I put new gas in the tank and the snowmobile does run but it runs rough. Considering the aforementioned, and the fact it runs rough, I am quite sure the carb is all gummed up / varnished. Will Sea Foam clean my carb (and other components) well enough or do I need to take the carb apart and clean it by hand? Additionally, what are your recommendations to best clean the carburetor (and other components) to resolve the problem?