I just bought a 1994 Black Fat Boy w/10K miles. It has apes on it, lowered in the rear, and a D404 Dunlop on the front and an Avon Roadrunner on the rear. When it first starts to rain, it is frighteningly slick, a lot more slippery than any bike I have ever had. A guy at the Harley shop told me the Avon's are a hard rubber compound and last a long time, but are slick in the rain. He also said the D404 was designed for a Honda and does not carry the heavy loads of a Harley. The treads look good on the bike, but man it is slick in a new rain. I am thinking of putting a set of D402 Dunlops on, but that is $500 away. I am not sure how old the tires are. Is my current tire combo a problem?