There are a few things that will cause your wobble like that. First is your load or where and how much the next is front bearings. Those are the two most common. The best thing to do if it happens is to try to put more weight on the frontend and hope it calms down before you eat asphalt. Just be careful
My SG wobbled at around 65 mph while going over a bridge. I believe it was started by a cross wind. I've since installed a Alloy Art Stabilizer and so far so good. I never want to experience that again. Very scary!
Well it doesn't matter ifit's a StreetGlide,the Batwing fairing has been on lots of other models for years...Not a StreetGlide issue. As another said, look at your tire ( air Preasure ), rear shock presure, alignment, etc..... not a problem unless the wind is high! Good luck!