New tires on this weekend. Have triple checked everything I could think of, tire direction correct, everything tight. Wheel is aligned as best to my ability. Any input on what would cause it to feel smooth and straight till I get up to around 75 mph then it started wobbling (straight away not through curves). An using dyna balancing beads instead of conventional weights.

 

Have you checked the Fall Away adjustment?

 

Plus 1 on that!

 

I don't know what that is let alone how to adjust it. The wobble felt so bad that I'm not sure if it was coming from the rear or the front

 

I'm running a 2010 Sportster 1200 Custom.

 

The bearings in the neck, need to tighten up or replace.

 

Could this be just bad alignment or out of balanced tires?

 

Yes it could be out of balanced, who put the tire on, didn't they balance it. At 1:10 in this video shows you how to check the fall away.

 

Drain the OEM swill from the forks and put in equal, and proper amount of BelRay 10wt and your problem will magically go away.

(ask me how I know)

 

I change the tires my self but I decided to use dyna balancing beads. Which I be gaining to think are my problem.