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[Robmay]

Forgive me if this has been hashed here before. I did a search and could not come up with anything concrete. Recently I purchased a 2010 Ultra Classic. I have a wobble that mainly happens on deceleration. It also can happen when slowing with the clutch pulled in and free coasting so to speak. I am hoping this is just a tire issue. I had the engine upgraded to a 103. It did it before with the stock engine and still with the upgrade. I just returned from a 1500 mile trip to the mountains of NC and it didn't get any worse or any better. It does not do it on every decel. I would say 40-50% of the time or a little more.

Any thoughts?

[Dan_Lockwood]

Forgive me if this has been hashed here before. I did a search and could not come up with anything concrete. Recently I purchased a 2010 Ultra Classic. I have a wobble that mainly happens on deceleration. It also can happen when slowing with the clutch pulled in and free coasting so to speak. I am hoping this is just a tire issue. I had the engine upgraded to a 103. It did it before with the stock engine and still with the upgrade. I just returned from a 1500 mile trip to the mountains of NC and it didn't get any worse or any better. It does not do it on every decel. I would say 40-50% of the time or a little more.

Any thoughts?

Some others have had this with the '09s and they say the steering head bearings were loose and after a proper setup at the dealership the decel wobble went away.

I just bought an '09 SERG and while I was adjusting my helmet one day riding solo, I took my hands off the bars for maybe 5 seconds at about 40 mph and the bike started to wobble.  I have noticed on mine a very slight decel wobble too.  I was going to get a few more miles on the bike and take it in for a steering head check.

I'm not sure but the manual says something about free falling from full lock in one direction back to neutral is like 2-1/2 flips of the bars.  This of course is done while in the air for the frontend to flip from left to right without tension.  The 2-1/2 flips may be off so check with a manual for the correct number of flips of the bars.

Good luck and don't let loose of the bars until you get it straightened out.

[FNGw/08SERK]

+1 for checking steering head ....... I had same symptoms Rob and that is the culprit in my case FWIW   Good Luck 

[Trapperdog]

Make sure the neck bearings were greased. Many a new bike has been delivered without grease. As Dan said, check the fall away, the manual will give you the correct specs.

[Mr D]

Make sure the neck bearings were greased. Many a new bike has been delivered without grease. As Dan said, check the fall away, the manual will give you the correct specs.

http://www.box.net/shared/tbyk3jqgho
click on link to open.....

[Robmay]

Thanks a lot guys! Fixed the problem on my buddies 2008 CUSE by just greasing till the grease came out the bottom AND top. Haven't done mine yet as it has to go in for its final dyno tune soon and I will have them grease it with that super duper special double oh seven grease mentioned in the TSB!!
 

Rob

[miker]

Frob, I found keeping the tire at bout +2 psi reduced it a bit too.  It is the 408, the 407 had stupid coast down robble.

[Texas 103]

Frob, I found keeping the tire at bout +2 psi reduced it a bit too.  It is the 408, the 407 had stupid coast down robble.

Went from a 407 to a 408 Problem solved

[Robmay]

WTF are ya'll talking about?   

[KarlG]

WTF are ya'll talking about?   

They're talking about Dunlop Harley Tire model numbers, the 2010 uses a 408, new this year. The low speed wobble coming to a stop and difficulty holding a line through a curve is most frequently steering head related like the bearings, assuming the front end fall off is adjusted. The fall off adjusts the bearing preload, and should be checked first. The local HD shop will do nicely 

[Robmay]

So I have a 408 AND the wobble......grease the bearing? Or what??

[TN]

i got a waddle.



TN

[spydglide]

So I have a 408 AND the wobble......grease the bearing? Or what??

I'd sure start with that as the simplist thing and from personal experience, I've had that help a decel wobble.   spyder

[pado]

Had the same thing on my Heritage from riding in the mountains.  Turned out to be my spokes were extremely loose.  Tightened and OK.

[Robmay]

I'd sure start with that as the simplist thing and from personal experience, I've had that help a decel wobble.   spyder

Frob, I found keeping the tire at bout +2 psi reduced it a bit too.  It is the 408, the 407 had stupid coast down robble.

Okay. Greased the bearing. It only took 123 pumps of grease to get the grease to peek out of the bottom and top of the neck bearing. 

The bike rode MUCH better. Before I was feeling every little bump and imperfection in the road. Now, much better. BUT.... on the way in this morning....wobble wobble at the first stop at the end of the road. So....I got to thinking of Miker's psi suggestion. Turns out the Snap On (Blue Point) air gauage I have at the house was off a bit. There was 31 psi in the front. So I jacked the pressure up to 40 in the front and took her for a cold spin. Seems fine. I'll know for sure in the morning on the way to work at the first stop sign.

I'll let ya know for sure.

Thanks for the input!!

Rob