Not too bad.
If you put the kick stand down, get off the bike and let it idle, it will vibrate the bike in circles about twice a minute
I wouldn't want to ride it for any real length of time on the street 2+ hours.
I think it will greatly improve when I build the stage 2 motor which will have a balanced crank.
I ordered some Warp 9 SM wheels today.
Should take about 2 weeks or so before they ship.
Warp 9 does not list them as a option but they will make them.
They said they don't get a lot of orders for them.
Understandable, who else want's to ride one on the street besides men of steel