I have asked my wrench and the first thing he said was the front tire.I have known him for 30 years and trust his judgment .JMO

 

I had the problem both before and after the tank lift. (approx 4"-self made). and as far as the front lifting at speed, my rear shocks are progressive 11" heavy duty's with the preload cranked all the way up (so as not to smack the fender into the belt guard)- they pretty much don't move. the forks sit approx. 1.5" from bottomed out when i am on the bike (I weigh about 300lbs). I really don't think I have enough surface area to create the sort of drag neccessary to lift the front of the bike 2.5 inches at 60-70mph. Not discounting the theory as it pertains to bikes with greater rear weight bias, but on a stock chassis with a wheelbase of 66.1" sitting as low as mine does, it is highly unlikely that I could generate enough lift to pull the front end up enough for the front tire to begin losing contact with the road ( for a pretty good explination of this go to http://www.msgroup.org/TIP180.html - you can even download the calculator to see how much lift you create). As for the front tire it is in decent shape- typical dunlop cupped on the sides, round in the middle. I am replacing the tires on both ends with some maxxis classics (not crazy about the brand, but they were the only ones that i could afford that offered the load rating i was after- 77rear, 56 front... again because of my own weight). My own theory on this was that the rear tire being out of line with the rest of the bike coupled with acceleration (and/or drag) was causing a side load on the engine mounts- which would then worsen the mis-alignment. and when the amount of side load on the mounts was increased or decreased (by acceleration, or passing a truck, ect) the mounts would spring back to center, or deflect worse, this oscillation would then cause the rear tire to turn in relation to the chassis and start a wobble, and any input on my part to stabilize the bike would then change the amount of deflection, and make the problem worse. I haven't been on any long road trips since re-aligning the bike, but the time i have been on the highway i have had no problems so far. as for aerodynamic lift affecting the chassis, I am going to try a few changes and see what happens. I will keep yall posted, thank-you for the input.

 

ok I ride a softail but the same thing happens on occasion to me I have found that it usually means I'm about due for a rear tire . the last time my front tire was damn near flat (out of air) just pumped it back up and has been good for last 3 months (think maybe the grand kids found the air valve and played with it..

 

I noticed with the Dunlops, my bike gets a little squirrely at high speeds when new skins are due. The Metzeler never gave any warning, even after the cords were showing[sm=oopssign.gif].

My bike did the slow speed wobble when loaded with gear, even right after brand new tires were installed by dealer.

Like said, no noticeable problem with proper tire pressure in front tire.

DougJ

 

I have a very simular problem at around the same speeds. My dealer told me this is normal for a dyna. I will take all of the suggestions listed and see if it clears up. My bike rides like a box truck at best! At speeds over 65 i can feel the handle bars wobbling in my hand and vibration in the foward controls.

 

Like I said earlier, I only have the slow speed decel wobble. Pretty sure its tires. I have new tires and asuper brace in my very near future. (you listening Santa???) As far as Dynas riding like a box truck...my WG rides like a cadilac at highway speeds....

 

It makes no sense to run 35 or 40psi in the front tire. Even if that doesn't cause a wobble right away, once the tire wears goofy it might.
Another cause of wobble in the current rubber mounts is that the factory only puts one rubber mount in the back and uses only one heim joint. The older bikes like the FXR had three rubbers mounts (two in the back) and two heim joints, which made the engine mounting much more stable. There are kits to retrofit the old mounting system, at least on touring bikes. I'm not sure about retrofitting Dynas.

 

My wobble is at high speed cornering 70 or above.

 

Big difference in the Street Bob ride and Wide Glide's Ride.. Griz your Wide Glide is a Cadillac at highway speeds...

 

I ride a 98 evo wideglide with 4" risers and poly bushings on my mini apes and no stabilizers of any kind. I have never had a problem with a wobble, except for temporary lane change of crossing the joint where 2 asphalt mats were laid. Or when crossing an iron grate bridge. Again those are only temporary. But the wobble described in this thread, if I had it, I would sure be concerned.

I can say that since I changed from Dunlops (Dunflops) to Metz, even the lane changes and bridge wobbles are gone. The bike is much more stable in all riding conditions.

I give credit where credit is due. Rebel Ryder encouraged me to go to the Metz. I will not change back.