Mine does the same. Shakes at Idle, then smooths out when I get on the road. It'll lightly shake the Windshield at idle at lights or stops, but not like it does at First Start.
I have, however, noticed something odd. At times..... I'll get a little Front-Wheel Side-To-Side action, like I'm riding on rutted roads. Our roads here are somewhat crappy, and when I see some wavy lines up ahead, I just hold on a little tighter.
I usually run my Tire Pressure at about 25/29 F/R on my Stock Tires, but maybe I need to Add/Decrease some??? I'm getting even wear, but wondering why it gets a little sloppy sometimes.
Thanks for any info!
Cheers!
BB