My 04 heritage softail started weaving today. When I decelerate at 70 to 60 mph it fishtails back and forth almost to a dangerous point. Any ideas? I need some opinions on this. I tightened the fork steering bearings and no improvement.

 

Is that decelerate by simply letting off the throttle in high gear, using engine braking or with the brakes applied? Every little bit of info counts. Can't have a situation like that going on too long. Sounds dangerous indeed!

 

Start with basics first, check tire pressure, check the spokes, make sure they are all tight, use a pencil and listen as you run the pencil over them as a loose one will have a flat sound. Is the wobble in your butt or just the bars?

 

yeah id say check those spokes I wouldnt ride that again until I found the problem and Fixed it

 

Progress Report:
The problem the rear wheel spokes.
I bought new bearings for the front and rear about a year ago; I replaced the front back then but held off on the back.
I jacked the bike up today and had an extreme amount of play in the back tire. I thought it was the bearings. When I started removing the rear tire I realized it was the spokes. I went ahead and replaced the bearings and tightened all the slack out of the spokes. I put the wheel back on the bike and left it on the jack, cranked it up, marked the wobble in the back wheel with chalk, and started adjusting the spokes to work it out. It took about ten rounds of marking the tire with chalk on both sides before I had it adjusted to running truer than it did when it was new.
Job complete, bike good as new again.
Thanks, to all of you for the responses.

 

nice work! thanks for the update