....yep, when air is compressed it does heat up slightly. However, this minute
increase does not effect the crankcase temperature of our engines.

The crankcase temperature of a YS engine is the same as any other four stroke
engine. Air is not "compressed" in the YS crankcase....rather the increase in crankcase
pressure, due to the piston moving downward is utilized to increase the intake
charge at the carb, and into the pressure chamber. To say this increase in pressure
also equates to an increase in temperature is certainly a stretch.

Are you trolling, or bait fishing ? [sm=teeth_smile.gif]

FBD.