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Handlebar Oscillating or Wobble

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(@wahlbornwi-rr-com)
Posts: 19
Eminent Member
Topic starter
 

@ben-franklin The bike has a stock steering dampening mechanism possibly I need a better one or it is defective.  The set up measurements are 

60 inch track width   -   152.4 cm

lean out 3 degrees   -    3%

toe in 1/8 inch   -   3.17 mm

sidecar wheel lead is roughly 10 inches.     -   250mm


 
Posted : August 29, 2026 5:14 am
 Arno
(@trespatas)
Posts: 50
Estimable Member
 

Posted by: @wahlbornwi-rr-com

@ben-franklin The bike has a stock steering dampening mechanism possibly I need a better one or it is defective.  The set up measurements are 

60 inch track width   -   152.4 cm

lean out 3 degrees   -    3%

toe in 1/8 inch   -   3.17 mm

sidecar wheel lead is roughly 10 inches.     -   250mm

Hi, thank you for your return; yes, the damper may have an issue, wobble would be normal in fact if you hadn't at the speed you mention.

Just one comment: 3 mm toe in, will make the setup very responsive, nervous, not a bad thing but will require all your attention.

 

PS: the damper should not be centered, must be engaged in the strait steering position, otherwise it will oscillate from on side to the other if at zero. 


This post was modified 4 weeks ago 4 times by Arno
 
Posted : August 29, 2026 5:36 am
(@ben-franklin)
Posts: 360
Prominent Member
 

@wahlbornwi-rr-com , well as Arno mentions, that is not very much tow in, especially for a rig with a relatively wide track.

 

I would have expected about 5/8", but maybe if it did not pull to the right with 1/8" I would have left it there.

 

Depending how adventurous you are in toe-in adjustment, you might try increasing to maybe 1/2" and see how that goes.  I would expect some goofy handling with 1/8".


 
Posted : August 29, 2026 7:57 am
Brstr, Arno and FlyingMonkeys reacted
(@sidecarusa)
Posts: 81
Estimable Member
 

No you are correct they were at the time 


 
Posted : August 29, 2026 8:03 am
(@miles-ladue)
Posts: 1809
Famed Member
 

Posted by: @wahlbornwi-rr-com

 I am located in western Pennsylvania near Pittsburg

Will-I-Am, given that you are near Pittsburg, there is a sidecar gathering happening next month, that you are requested...requested I say...to attend.

 

The PenNy Hackers gathering is in CLARINGTON, Pennsylvania.

 

September 17-20, 2026

Timber Haus 

Make your reservation at  https://thetimberhaus.com/

camp sites, cabins, and hotel rooms available

374 Shiloh Lane, Route 36
Clarington, PA 15828
814-646-7750

Call or Text

Join us for a casual get-together of sidecars and sidecar enthusiasts

near Cook Forest State Park

No sidecar? No problem! Come see why sidecars make people smile!

Join us around the campfire every night

Cookout on Saturday!

 

Questions?  MJ sidecarwitch@yahoo.com  724-316-8809

 


Two Million Mile Rider
Exploring the World in Comfort

 
Posted : August 29, 2026 9:11 am
MJ reacted
(@panhead_kicker)
Posts: 106
Estimable Member
 

On an otherwise good handling rig, I developed a front-end wobble at lower speeds that my steering damper couldn't damp. Turned out my front tire had worn unevenly to one side, after several thousand miles. New tire, wobble gone. Probably not your issue since the sidehack is new to the bike, but worth understanding the possibilities.


 
Posted : August 29, 2026 11:43 am
Brstr, FlyingMonkeys, SIDECARUSA and 1 people reacted
 Arno
(@trespatas)
Posts: 50
Estimable Member
 

Posted by: @ben-franklin

@wahlbornwi-rr-com ,   I would expect some goofy handling with 1/8".

Hihihi.....yes, BUT it's so sharp.... basic_smile  

 

 


 
Posted : August 29, 2026 3:15 pm
Brstr and Ben Franklin reacted
(@sidecarusa)
Posts: 81
Estimable Member
 

I would change many of those settings but hey if you like it then leave it.

 

The chassis is a dmc cx frame design from washington boss and clamp version. Relatively easy to adjust if you want more toe in adjust the rear heim joint out a few turns and see what that does for you.

 

Also from what I have heard  tsc is no longer authorized to be building those sidecars so yours was probably the last one made in the states. Watsonian squire usa will continue to sell the British made sidecars in the us with the original frame they were built on


This post was modified 3 weeks ago 3 times by SIDECARUSA
 
Posted : August 30, 2026 2:57 pm
(@wahlbornwi-rr-com)
Posts: 19
Eminent Member
Topic starter
 

@sidecarusa you mean I don’t have a Watsonian classis?


 
Posted : August 30, 2026 6:43 pm
(@sidecarusa)
Posts: 81
Estimable Member
 

Yes you just have the body and fender everything underneath is dmc sidecar metal works


 
Posted : August 31, 2026 10:58 am
Brstr, Arno and FlyingMonkeys reacted
(@miles-ladue)
Posts: 1809
Famed Member
 

Posted by: @sidecarusa

Yes you just have the body and fender everything underneath is dmc sidecar metal works

As Scooby Doo would say...

Rut Roh Scared  

 


This post was modified 3 weeks ago by FlyingMonkeys

Two Million Mile Rider
Exploring the World in Comfort

 
Posted : August 31, 2026 11:55 am
(@sidecarusa)
Posts: 81
Estimable Member
 

Its the dmc cx street frame you can tell by the rocker arm assembly and swingarm set up. Also its boss and clamp the watsonian frames are not and on the ones from watsonian in Britain the bumpers are part of the frame not bolted to the body So its somewhat of a hybrid car. Not talking trash but thats what you have


This post was modified 3 weeks ago by SIDECARUSA
 
Posted : August 31, 2026 12:08 pm
Brstr, FlyingMonkeys and Arno reacted
(@wahlbornwi-rr-com)
Posts: 19
Eminent Member
Topic starter
 

@sidecarusa is DMC A good quality product?


 
Posted : August 31, 2026 5:07 pm
(@miles-ladue)
Posts: 1809
Famed Member
 

Posted by: @wahlbornwi-rr-com

@sidecarusa is DMC A good quality product?

Oh, William,  you have opened the proverbial "Can 'o Worms".  Surprised  

 


Two Million Mile Rider
Exploring the World in Comfort

 
Posted : August 31, 2026 5:36 pm
Ben Franklin, Thane Lewis, Arno and 1 people reacted
(@ben-franklin)
Posts: 360
Prominent Member
 

@wahlbornwi-rr-com Well, mine was built along side yours, at the time...  DMC had a few issues towards the end of their run.  This thread captures my journey with them, at the time.  Jonny tried hard to fix the owner's bad decisions, but ultimately had to live with him until the end:  It got kind of ugly.

 

DMC Thread that evolved into my Africa Twin build:


 
Posted : August 31, 2026 8:05 pm
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