Now please don't take this the wrong way but if you don't know how to tighten a steering head bearing it might be wise to let an experienced mechanic do it . But it isn't quite that simple . You've got to get the front wheel off the ground first to check for free movement and notching . If the bearings are in poor shape, simply tightening them will give you another set of problems such as weaving rather than wobbling . You could end up replacing the bearings which requires the whole front end to be removed . And while we're at it , what about the back end ? What if the swinging arm bearings are knackered ? In my experience a front end problem can actually be a back end problem and vice versa . What you really want is for an experienced mechanic and rider to jump on the bike and ride it before you start throwing money at it . And then there's the wheel bearings.............

 

1. Alignment.!
2. Steering head bearings
3. Motor mounts
4. Boingy Suspension
5. Wire wheel offset
6. Tire pressure

Most of the above will have a ripple effect n cause a tank slapper. Had high speed wobble on my '13 iron last year at 110Mph..turned out i forgot to tighten up my preload cos i mostly have it on very soft cos of the roads we have here.