I received my F3 Idler Pulley Kit (Part #219800412) today and got installed in 30 minutes. I took it for a test ride and got up to 105 mph before I had to slow down for a tee in the road, no vibration anywhere from 0 - 105. All is well
My Spyder History
2013 ST Limited - 16,000 miles
2015 F3s - 48,500 miles
2016 F3t - TBD