more than likely it is out of fork oil, or something is broken inside the fork.
Softail shocks are under the transmission. They sit horizontally and are inline with the chassis. Unlike the shocks on all other Harleys, when you hit a bump on a Softail, the shocks get longer instead of shorter.
Usuly the shocks are wore out
Check the strut mountings Check springs and shocks they may be worn out
check shocks
The problem is either worn suspension parts (e.g., tie rods, idler arm, ball joints) or worn shocks/struts.
Your main problem is likely a wheel that is out of balance. A secondary problem is worn out shocks. Have the front wheels professionally balanced and see if the problem goes away. If not completely gone, replace your front shocks.
bang, bump, slur
You probably have worn out shocks or struts.
Typically, it's either shocks or struts, depending on which your car has. Shocks/struts absorb the resonance energy of springs. The PURPOSE of the shock/strut is to stop the wheel from bouncing when you hit a bump. Without the shocks, the wheel would continue to bounce, sort of like a basketball. When the shocks work properly the wheel is "dampened", keeping the tire in contact with the road and giving better control. The bonus is, the car doesn't bounce, the way you're describing. The good news is, they're not terribly expensive and they're usually not impossible for the DIY'er. But if you prefer, it's not terribly expensive, as auto repairs go. If you have someone do the shocks, have them check other suspension components at the same time. No point in replacing just the shocks if the whole front end is worn out.
Because when you hit a bump, instead of bouncing over it you will hear a bang as the shock bottoms out. They aren't too difficult to replace really. Big bolt top and bottom you'll need a half inch socket drive and not much else.
No, the suspension needs springs, the shocks are there to damp the springs so the car does not bounce up and down after it hits a bump.
collide knock, hit, strike, crash, smash, slam, bang