This weekend’s racing will be a little less frantic that it was on Memorial Day Sunday. But there still is a pretty good variety for fans to choose from.   This afternoon there is a special event for youngsters. The AC/DC Bike Camp has demonstration rides at the Double Diamond Athletic Club. The goal is to sign up young riders for their Electric Trials Bike Lessons and it’s open to any one 6 years and older that can ride a bike.   Demonstration rides will be held from 4 until 7 p.m. Two tracks in our region will be in