Bagger wobble exposed!
Thread Starter
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Club Member
Joined: Jun 2007
Posts: 45,429
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From: Bedford UK
I appreciate why True-Track is bolt on ... but presumably I could get the same effect by welding a bracket onto the center of the cross plate and mounting it to there?
Anything I would have to look out for ... a longer rod end bearing set ... ground clearance? Has to be doable.
Sadly, the previous owner of my bike was a cheapskate who went for a Progressive.
Anything I would have to look out for ... a longer rod end bearing set ... ground clearance? Has to be doable.
Sadly, the previous owner of my bike was a cheapskate who went for a Progressive.
Banned
Joined: Apr 2014
Posts: 678
Likes: 1
From: LA
Yup, it and the 10,000 other things I need to spend money on ... if I'm at 'good enough', I'll live with that for a while. Did you fit your CCE clamping top triple tree? Which would you say gave more benefit?
Rough measurements ...
Well, this was the opposite of what I was expecting.
Excuse me as I only have a simple dial calliper, so I have to use its length (approx 9.25") + the measure of the depth measuring tip.
I measured across the top and bottom of the flats of the inside of the swing arm mount/passenger footplate brackets, again both top and bottom bolt hole.
Firstly, as I would expect, they were not equal distances, being out by about 18 thou/.5 mm from minimum to maximum.
However …
When I torque them up to around the maximum set by the manual (34-42 ft-lbs), the distance actually increased, not decreased.
In my case, I have STA-BO bushes, so it went; Bracket > Donut > Sta-Bo > Transmission > Sta-Bo > Donut > Bracket
Loose | Torqued
0.832 | 0.857
0.838 | 0.860
So it expanded … the transmission and bushes pushed the frame apart 22 to 25 thou.
I could not measure the bottom one.
Perhaps over the next few days, I'll dig a jack out and see how much I can expanded it apart (... within limits) if anyone can suggest any test. Obviously it's going to be rough but do have a dial gauge I can try and set up too.
(For the record, the Sta-Bos are recommend to fit with .005" clearance to the transmission ... but I can't see how they don't compress).
Rough measurements ...
Well, this was the opposite of what I was expecting.
Excuse me as I only have a simple dial calliper, so I have to use its length (approx 9.25") + the measure of the depth measuring tip.
I measured across the top and bottom of the flats of the inside of the swing arm mount/passenger footplate brackets, again both top and bottom bolt hole.
Firstly, as I would expect, they were not equal distances, being out by about 18 thou/.5 mm from minimum to maximum.
However …
When I torque them up to around the maximum set by the manual (34-42 ft-lbs), the distance actually increased, not decreased.
In my case, I have STA-BO bushes, so it went; Bracket > Donut > Sta-Bo > Transmission > Sta-Bo > Donut > Bracket
Loose | Torqued
0.832 | 0.857
0.838 | 0.860
So it expanded … the transmission and bushes pushed the frame apart 22 to 25 thou.
I could not measure the bottom one.
Perhaps over the next few days, I'll dig a jack out and see how much I can expanded it apart (... within limits) if anyone can suggest any test. Obviously it's going to be rough but do have a dial gauge I can try and set up too.
(For the record, the Sta-Bos are recommend to fit with .005" clearance to the transmission ... but I can't see how they don't compress).
Last edited by Dun Roamin; Aug 20, 2014 at 09:51 PM.
Banned
Joined: Apr 2014
Posts: 678
Likes: 1
From: LA
I see there's a new pretender on the block .. the Track-true.
I think if I was the True-track guy, I'd pay someone to kick their asses. Even if that meant an intellectual property attorney.
Half-price though ...
I think if I was the True-track guy, I'd pay someone to kick their asses. Even if that meant an intellectual property attorney.
Half-price though ...
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,830
Likes: 7,968
From: poway
DR,
Not sure how you make your measurements.. I'd expect that the donut would crush a little but the frame would also spread under the preload.. Adding preload to the rubber mounts helps to stabilize the chassis.
What does this have to do with the wobble?
Not sure how you make your measurements.. I'd expect that the donut would crush a little but the frame would also spread under the preload.. Adding preload to the rubber mounts helps to stabilize the chassis.
DR, we have at least one HDF member who is successfully running a 155" engine in his ole bagger, with complete success,
Thread Starter
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Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,897
From: Bedford UK
Not yet. I recently discovered to my horror that my super expensive custom Harrison 13" front brake rotors are knackered - again. I have been agonising over what to do and have finally decided on an even more thorough front-end upgrade. So my fork rebuild, with the CCE kit, is now going to include latest 41mm sliders and current Brembo calipers, plus a 2010 SG front wheel with Lyndall composite rotors. I've been busy on US Ebay acquiring the parts, still waiting for some of it to come in. It's going to be a while before it is roadworthy I'm afraid!
Thread Starter
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Club Member
Joined: Jun 2007
Posts: 45,429
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From: Bedford UK
I believe you are going down a blind alley with this. While the frame may well flex, there are other more serious aspects of the vehicle that adversely influence handling and steering. Any actual flexing is secondary.
Tourer
Joined: Apr 2014
Posts: 288
Likes: 3
From: UK
We will have to agree to disagree on this one. Its what the True Track link stops so there must be a problem in this area. I like to measure stuff and used the data to back up a hypothesis.
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Thread Starter
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Club Member
Joined: Jun 2007
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From: Bedford UK
You plainly haven't understood the significance of my original post! The True-Track kit stops motion of the Assembly (as I call it) on its rubber mounts, it has nothing to do with the rigidity of the frame. Read it again and ask questions - I started this thread to clarify the problem and will stick with it until I achieve that!
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Joined: Apr 2014
Posts: 678
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From: LA
I then extended the depth measuring stem out to measure the distance between the end of the gauge's main scale and the bolt hole boss on the other side.
And repeated on the top and bottom of both bolt holes to check for unevenness.
Not highly accurate but enough to register some change and a starting point.
Of course I'd agree that frame flex is minor in comparison to both the rubber mounting issue ... but I would add the looseness of the swing arm pivot in the transmission which translates to quite a bit of movement at the end of the swing arm.
Hence my question what an ideal fit would be.