Do street motorcycles in Wisconsin need front turn signals?

Yes.

Yes. If your motorcycle was manufactured after 1985.

It varies by state.

Fix the rear signals.The most common cause of this is the wires going from the front to the rear.These might need to be replaced.It could of course be as simple as changing the bulbs.It might have...

depends on the state and also in some states depends on the age of the motorcycle.