When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Check the steering neck bearings. Adjust according to the service manual.
If that doesn't work, I would look at how he is loading the bike. In any case, find the cause before you find him on the side of the road up to his ears in gravel.
neck bearings are new and adjusted according to service manual. he seems to think it is coming from the rear end. i don't know when last time bearings were serviced.
Again... proper inflation is usually the culprit at high speeds. Max out the psi that's on the tire at cold temp if you are going to be riding at high speeds for prolonged periods.
I had front end wobble on my bike (08 Crossbones) and it turned out to be that the rim was out of true. Fortunately the dealer covered it under warranty so it only cost me $6 for some wheel weights and it completely fixed the problem.
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.