Regular house insulating spray can foam. Like the pellet idea also. We cannot get lead shot anymore up here so will need to be steel shot. I may use a bar end mirror on the left as I have one here from another project. I also have a '08 Honda CBR125R here that has a 10500 red line with counter balancer. Still get a tingle from vibration after a few hours running hard. Short clip on bars. (edited)
