How many out there using True Track?
Road Captain
Joined: Sep 2011
Posts: 508
Likes: 2
From: Idaho Panhandle
...Now what the True-Track did not address was the slow speed take your hands off the bars tank slapping wobble. IMO, and I only state this from postings here and not as some sort of "KIA" expert on the subject, is perhaps my steering head is set too loose and could use some adjustment...
Bob
Checking the Fall Away sure makes sense , but ya might also consider checking the tires, assuming yer still running the stockers. Heard tell of some Dunlops having a casing defect inside, so the casing is actually loose on the interior of the tire causing just that type of low speed wobble. The way I heard to check is to over inflate the tires to around 50-55 pounds ( keeps the casing from floating internally) and go for short! low speed putt and see if it cures the weeble wobble.
Bob
Tourer
Joined: Mar 2009
Posts: 259
Likes: 1
From: I'm on the Central West Coast
Many of them just get used to it and don't see it as a problem if they don't push the bike at all.
Most aggressive riders will feel something isn't right and go looking for the cause.
You find all sorts of solutions. My personal belief is to effect as many of them as possible.
Simply looking at the Dyna chassis design should give you some clue as to why it can be unstable.
For my '09 SuperGlide I found that doing the engine alignment, shimming the front motor mount, upgrading the rear shocks and the chassis stabilizers all did something to improve the ride.
The Stabilizers (Sputhe, in my case) were probably the most marked improvement.
I've heard people talk about using fork braces also but with the 49mm tubes I don't think it's needed.
Again, that's only my opinion.
Road Captain
Joined: Sep 2011
Posts: 508
Likes: 2
From: Idaho Panhandle
Kinda hard to believe, but a lot of people don't ever notice it.
Many of them just get used to it and don't see it as a problem if they don't push the bike at all.
Most aggressive riders will feel something isn't right and go looking for the cause.
You find all sorts of solutions. My personal belief is to effect as many of them as possible.
Simply looking at the Dyna chassis design should give you some clue as to why it can be unstable.
For my '09 SuperGlide I found that doing the engine alignment, shimming the front motor mount, upgrading the rear shocks and the chassis stabilizers all did something to improve the ride.
The Stabilizers (Sputhe, in my case) were probably the most marked improvement.
I've heard people talk about using fork braces also but with the 49mm tubes I don't think it's needed.
Again, that's only my opinion.
Many of them just get used to it and don't see it as a problem if they don't push the bike at all.
Most aggressive riders will feel something isn't right and go looking for the cause.
You find all sorts of solutions. My personal belief is to effect as many of them as possible.
Simply looking at the Dyna chassis design should give you some clue as to why it can be unstable.
For my '09 SuperGlide I found that doing the engine alignment, shimming the front motor mount, upgrading the rear shocks and the chassis stabilizers all did something to improve the ride.
The Stabilizers (Sputhe, in my case) were probably the most marked improvement.
I've heard people talk about using fork braces also but with the 49mm tubes I don't think it's needed.
Again, that's only my opinion.
How many using True Track?
PlumberTom capsulized the Dyna scenario best I've seen. Yes, unfortunately the Dyna line has a weak spot in the design of the Frame vs. engine mount. So if you like Dyna's like I do... get on with the fixes.
They all help some....heck I did them all, before I finally did the Sputhe Stabilizer system front and rear. More or less every little bit helps firm up the Dyna Frame and Engine mount scenario. But whether you choose True-Track (site sponsor) or Sputhe.....You can't go wrong. You will like the results.
GARY
They all help some....heck I did them all, before I finally did the Sputhe Stabilizer system front and rear. More or less every little bit helps firm up the Dyna Frame and Engine mount scenario. But whether you choose True-Track (site sponsor) or Sputhe.....You can't go wrong. You will like the results.
GARY
Tourer
Joined: Mar 2010
Posts: 430
Likes: 2
From: Dirty City
Otherwise (with the swingarm mounted to the frame) as the engine moves within the chassis, its pulley moves in relation to the rear pulley, putting lateral friction on the drive belt and potentially increasing wear and noise.
That's not to say that there wouldn't be a change in how the bike handles. However, I ride pretty damn hard (down to scraping frame at this point) and have done so since I bought mine 20,000 miles ago and I've never had any issues with wobbles or running wide. It may be that the rubber mounts on some engines aren't as stiff as others, resulting in the effects mentioned in this thread.
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Road Warrior
Joined: Jul 2008
Posts: 1,286
Likes: 5
From: Arizona
The reason it was done is because the engine is rubber-mounted to the frame. This means that the only way to ensure that the drive belt runs true is to mount the swingarm to the engine.
Otherwise (with the swingarm mounted to the frame) as the engine moves within the chassis, its pulley moves in relation to the rear pulley, putting lateral friction on the drive belt and potentially increasing wear and noise.
That's not to say that there wouldn't be a change in how the bike handles. However, I ride pretty damn hard (down to scraping frame at this point) and have done so since I bought mine 20,000 miles ago and I've never had any issues with wobbles or running wide. It may be that the rubber mounts on some engines aren't as stiff as others, resulting in the effects mentioned in this thread.
Otherwise (with the swingarm mounted to the frame) as the engine moves within the chassis, its pulley moves in relation to the rear pulley, putting lateral friction on the drive belt and potentially increasing wear and noise.
That's not to say that there wouldn't be a change in how the bike handles. However, I ride pretty damn hard (down to scraping frame at this point) and have done so since I bought mine 20,000 miles ago and I've never had any issues with wobbles or running wide. It may be that the rubber mounts on some engines aren't as stiff as others, resulting in the effects mentioned in this thread.
There are other ways HD could have rubber mounted the engine without mounting the swingarm to the transmission/engine assembly. The FXR had a rubber mounted engine and the swingarm pivoted off the frame. Some call the FXR the best handling Harley ever. Eric Buell fought with the designers to include the horizontal engine stabilizers on the Dyna's and they refused to do it. They omitted the stabilzers to save money...the same reason they stopped building the FXR...the frame had too many individual frame tubes, more welding and time was required to assemble the frame and it cost too much money to make. With HD's (new) hydro forming technology used on the V-Rod frame they could redesign the Dyna frame and assembly method to come up with an FXR rubber mounted style frame (frame mounted swingarm) that is less time consuming and less expensive to build.
Tech23
There are other ways HD could have rubber mounted the engine without mounting the swingarm to the transmission/engine assembly. The FXR had a rubber mounted engine and the swingarm pivoted off the frame. Some call the FXR the best handling Harley ever. Eric Buell fought with the designers to include the horizontal engine stabilizers on the Dyna's and they refused to do it. They omitted the stabilzers to save money...the same reason they stopped building the FXR...the frame had too many individual frame tubes, more welding and time was required to assemble the frame and it cost too much money to make. With HD's (new) hydro forming technology used on the V-Rod frame they could redesign the Dyna frame and assembly method to come up with an FXR rubber mounted style frame (frame mounted swingarm) that is less time consuming and less expensive to build.
Tech23
Tech23
We written and very informative. Thanks
Bob