Yes that is true, the EVO should be warmed up before riding. As for the base gaskets, there is no quick fix, but the best gasket to use is the Cometic base gasket. I have used James and Cometic. Never had a leak with a Cometic.
07' Night Train
103",Flat tops,54H Cams
Stock Heads 83cc/CNC by Rev Perform
S.E. Camplate, SE-Supertrapp,ThunderMax A/T
Herko Back plate/Zippers Filter