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2012 Street Glide stability problem

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Old Jul 11, 2012 | 03:41 PM
  #11  
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[quote=Rickr01;10054862]New frame design took care of the majority of that wobble. quote]

Can you or anyone else please explain why you think the new frame design took care of majority of the wobble? My 09 SG still needed a stabilizer to rid that wallowing flat tire feeling, that wobble I still got in sweepers or grooved uneven road surfaces.
 
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Old Jul 11, 2012 | 03:44 PM
  #12  
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Originally Posted by Joesil
Hello all,

I'm new to HD Forums so bear with me.

I currently have a new '12 SG and have been experiencing some stability problems. The bike has approximatley 1600 miles on it.

The problem I've been experiencing only occurs at highway speed above 70 mph. At those speeds the bike sometimes feels like the rear end is in water and the bike itself feels wobbly.. I have to back off the throttle to let it settle down on its own. A friend riding with me noticed that at the higher speeds the rear tire didn't seem to rotate properly and kinda wobbled. At lower speeds it rotated properly and looked straight.

I have checked the tire pressure and that was good. I dropped the bike off at the dealership last night and was just looking for some answers in case they don't come up with anything.
What wheels do you have? not spoked?
 
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Old Jul 11, 2012 | 03:57 PM
  #13  
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Originally Posted by Joesil
Hello all,

I'm new to HD Forums so bear with me.

I currently have a new '12 SG and have been experiencing some stability problems. The bike has approximatley 1600 miles on it.

The problem I've been experiencing only occurs at highway speed above 70 mph. At those speeds the bike sometimes feels like the rear end is in water and the bike itself feels wobbly.. I have to back off the throttle to let it settle down on its own. A friend riding with me noticed that at the higher speeds the rear tire didn't seem to rotate properly and kinda wobbled. At lower speeds it rotated properly and looked straight.

I have checked the tire pressure and that was good. I dropped the bike off at the dealership last night and was just looking for some answers in case they don't come up with anything.
Let us know what the dealer says. I've got over 13,000 on my '12 SG and just returned from a 3,000 mile trip with the majority of those miles at 80mph with the cruise on. Never felt nothing like you're describing, only a loud whining noise and a little wobble when the rear tire went flat .......
 
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Old Jul 11, 2012 | 06:45 PM
  #14  
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Could it be possible that your rear shocks are at different pressures? I know that they are tied together and therefore should both be at the same pressure, but just a thought that maybe one side could have a pinched line and the other has bled down???

I know grasping at straws....
 
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Old Jul 11, 2012 | 07:12 PM
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Wheel out of balance?
 
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Old Jul 12, 2012 | 05:55 AM
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[QUOTE=so.cal.gal;10057302]
Originally Posted by Rickr01
New frame design took care of the majority of that wobble. quote]

Can you or anyone else please explain why you think the new frame design took care of majority of the wobble? My 09 SG still needed a stabilizer to rid that wallowing flat tire feeling, that wobble I still got in sweepers or grooved uneven road surfaces.
There are articles all over regarding the changes in the new frame and mounts that helped the wobble. Engine mounting points are just one big adavantage the new frame has. When I have a free moment I can poke around and find two articles that had been previously posted on the subject. If you are experiencing wobble like that on your 09, you need to be looking at rear tire alignment, motor alignment and mounts etc. Rubber mounts need to be maintained right on the money in regard to various alignments. My buddy installed a new exhaust system and did not tighten the system according to the instruction. It loaded up the mounts and he developed a wobble. He decided that it was the dreaded wobble and had been there all along...Wrong! When we spent a Saturday morning going over his bike once we loosened the exhaust hardware the engine shifted noticably. We loosened up the motor mounts, started it up, then retorqued the mounts and followed the correct exhaust tightening procedure and he had a new bike. No more wobble.
 
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Old Jul 12, 2012 | 06:19 AM
  #17  
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Check steering head fall away. Playing around with my 2010, that will take away the queasy feeling in the rear. Also... make SURE the tires are at 40 psi, just don't look and assume. I had a rear go down to 15lbs and it LOOKED OK to me. I carry a plug kit, plugged the tire, aired to 40, and that rear end went nice and solid again.
 

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Old Jul 12, 2012 | 07:22 AM
  #18  
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Default Rear end wobble

Thanks for all the suggestions. I will let you all know as soon as I hear back from the dealer and what if anything they find. I had checked all the simple things that I could do on my own. The tire pressure was set at 40 psi. I also put the rear end up on a jack and let it run while I watched the rear tire spin. I saw nothing out of the ordinary and the tire seemed to rotate properly. If it is a bearing issue I assume things would be different with a load on the tire.

Thanks again
 
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Old Jul 12, 2012 | 01:25 PM
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Firstly, disregard everyone on these forums that immediately posts "I have a (similar bike) and I have never had that happen!". It continues to boggle me as to how that's supposed to help.

The weave / wiggle / wobble you feel is real, regardless of how many people haven't felt it.

These bikes are not all perfectly identical. The MoCo has some strange tolerances and things slip through the cracks. Trust your experience not these forum nerds.

You've checked some simple things, now move on to some bigger things.

What I felt as ***-end wiggle on highway sweeps was actually a tight steering head bearing. To check that, lift the bike so that the front end is clear, get any binding cables or gear outta the way and turn the bars all the way to one side then let go. The should smoothly roll to the opposite direction, then back to center, perhaps just past center and then to rest. Do this from the left and right. Mine barely just made it to center from the left and never to center from the right. I tore into the fairing and adjusted the bearing and viola, it handles SO much better. The manual even says that if it's too tight the bike will not be able to absorb a weave and if it's too loose it can develop a wobble.

So, now you did the drop-down test from the manual and it's perfect. Awesome, now strap that bike to your lift with the rear wheel hanging try putting significant, but not harmful, upward pressure on your drive belt. Does the swing-arm move horizontally? If so, that's a problem. I'd never heard of this test, but a builder buddy had a bike in his shop that they diagnosed in this way. You can also just manhandle the thing to see if there's is play. Inspect the swing arm mount and engine mount bushings for weird wear while she's in the air. If you suspect the swing-arm is moving horizontally, Progressive Suspension is selling a Tour-Link for the 2009-2012 models to address this exact issue. I got mine from directharparts.com for $50 less than MSRP. I'm still trying to decide whether to install it.

If it's under warranty and you trust your dealer, make them check this stuff out, why not?
 
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Old Jul 13, 2012 | 05:52 AM
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Originally Posted by KCMooose
Firstly, disregard everyone on these forums that immediately posts "I have a (similar bike) and I have never had that happen!". It continues to boggle me as to how that's supposed to help.

The weave / wiggle / wobble you feel is real, regardless of how many people haven't felt it.

These bikes are not all perfectly identical. The MoCo has some strange tolerances and things slip through the cracks. Trust your experience not these forum nerds.

You've checked some simple things, now move on to some bigger things.

What I felt as ***-end wiggle on highway sweeps was actually a tight steering head bearing. To check that, lift the bike so that the front end is clear, get any binding cables or gear outta the way and turn the bars all the way to one side then let go. The should smoothly roll to the opposite direction, then back to center, perhaps just past center and then to rest. Do this from the left and right. Mine barely just made it to center from the left and never to center from the right. I tore into the fairing and adjusted the bearing and viola, it handles SO much better. The manual even says that if it's too tight the bike will not be able to absorb a weave and if it's too loose it can develop a wobble.

So, now you did the drop-down test from the manual and it's perfect. Awesome, now strap that bike to your lift with the rear wheel hanging try putting significant, but not harmful, upward pressure on your drive belt. Does the swing-arm move horizontally? If so, that's a problem. I'd never heard of this test, but a builder buddy had a bike in his shop that they diagnosed in this way. You can also just manhandle the thing to see if there's is play. Inspect the swing arm mount and engine mount bushings for weird wear while she's in the air. If you suspect the swing-arm is moving horizontally, Progressive Suspension is selling a Tour-Link for the 2009-2012 models to address this exact issue. I got mine from directharparts.com for $50 less than MSRP. I'm still trying to decide whether to install it.

If it's under warranty and you trust your dealer, make them check this stuff out, why not?


+1.....It can be solved. Theres no need to ride around feeling no trust in your ride...Frankly, if you pick apart all the suggestions you've received so far and touch on each one, you'll more than likely end up with a more stable bike than many folks on the forum..
 
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