dyna shakes

Hello I’ve been driving for 3 years ne dyna superglide custom from 2009 as cheap English and since then about 10000 km. Actually I find the style quite good …but I like to drive a little bit more and have therefore grown an original Harley windshield … it has quickly noticed that the moped from about 140 becomes quite unstable. at the last inspection I have therefore tried other matures ..metzler … which made the thing even worse … and today I have mi This is why you almost put on the snatch … have needed the whole track to capture the part … at 140 … thought ..now you die .. I don’t have a BOCK MORE .. THE week the part comes to the dealer … either he gets it, or I buy a road king again … or .. even better ne BMW .. has someone similar probs …or even better ..ne SOLUTION?? lg klaus