I have a 2006 FXST softail i get a death wobble at speeds above 120km i weigh 150lbs i have had other people the same weight ride it and they also get the wobble. I had a harley mechanic for 25 years look at it and he cant get it to do also had other friends ride it and again it wont do it. It seems like if your over 190lbs it does not wobble. The harley mechanic has checked the following and was going to check the rear suspension next.Everything seems to be in spec not sure what next step is any comments would be helpfull.

Head bearings
spokes
put new tires on
alignment
forks
bushings

 

Everything that needs to be checked for the wobble should include, but not be limited to:

• Air Pressure
• Rear Wheel Alignment 0.793mm In Between Side To Side
• Tires Not Balanced
• Rim / Tire Out Of Round
• Steering Head Bearing Incorrectly Torque
• Wheel Spacers
• Wheel Bearing
• Engine Mount
• Transmission Mount
• Equal Amount Of Fluid In Both Forks
• Loose Axle Nut
• Caliper Alignment
• Neck Bearing Adjustment
• Swing Arm Pivot
• Shocks Rear Aligned Equally
• Top Of Forks Not Extending More Than 10.66mm - 12.7mm And Be Equal
• Steering Stem Nut
• Swing Arm Bushings

 

What he said!