Old Bikes

We rode to the drag strip one Saturday, and all these older Harleys rode in right after us.  It was cool, since most times it's a sea of Twin Cams !  That's dad's ol' '65FLH (nearest) running a late model CV carb and Spike timer.  The last few days he's been fabricating a 42mm Mikuni flat slide.  He had it running in the garage, and said, "It's definitely more responsive."  The CV has a flat spot about off-idle that we just can't seem to ditch . . . it runs ok, but ok sometimes ain't good enough, (you know what I mean)