You can also try dynamic balancing, with something like Dyna Beads. They are simple to install. I was a skeptic but have to admit they work very well.
Let me elaborate. The front wheel on my Interstate was always difficult to balance. There was always a speed range where I'd get a little vibration. These massive Valkyrie wheels can have light areas that make balancing very tricky. I've read of some with enough porosity to allow slow air leaks.
At first I thought Dyna Beads were snake oil. Then I read truck drivers had been doing this for years, with lead shot, BBs, even sand. The concept actually makes sense. And it works. I pulled the weights and put the beads in that front tire. It was glassy smooth at all speeds. I'm a believer now.
