Steering Wobble At Freeway Speeds

Checked tyre pressures ! If you run them a little low , they wear funny and can cause handling issues

 

The cafe race bars, are the clip ons or ones that bolt into the top clamps, if this happened since putting the bars on it could be the added weight on the front so you might have to adjust tyre pressure or suspension. At any point did you unclamped the forks? If so could they be slightly twisted? Try swapping the bars back and if the problem is resolved then you have your answer it’ll be the extra weight on your front end.

 

Take them off , see if that cure's the wobble ! If so it's either weight distribution or wind turbulence . A very small amount of weight distribution change can affect stability. Are you a fairly light build and weight ? This can affect the bike's handling , they are setup from the factory for rider's to be 'average' height and weight , so suspension adjustment might be the order of the day ???

 

Jason S
The other thing you need to check is that you haven't buckled the front wheel slightly or have a bearing starting to collapse. But things like saddlebags can alter the handling so do check.
Regards
Joe.