Is there a steering damper out there that i wouldn't need to get a mortgage for and works well?

Like those Chinese ones you can get, has anyone tried them?

Im looking for a damper for my 1990 gk76a as it does not have one. At 50mph or over if you let go of the bars it rides straight but if you go below 40mph the handle bars shake and get worse the slower you go!

if i was you i think id be having a good look at the front tyre and wheel possible could be a balancing problem but sounds quite severe.

I was actually thinking that my self. And yes I will be getting it checked!

I wasn't wanting a damper to cure the shake (I'm sure it could of sounded that way though) I just want a damper for it.