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torque link anchor point

  • Thread starter Thread starter Guest
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Guest

Guest
Can anyone tell me what the difference is between the links attached to the swing and the ones att to the frame?

I am running a 93 gsxr rear wheel with a floating caliper and torque link.

Does it matter where I attach it?

katman.
 
If the torque link it attached to the swingarm it feeds it's torque into the swingarm effecting the suspension action, if it is attached to the frame and is at least as long as the swingarm it just floats there and allows the suspension to work properly.
My underslung caliper uses the centrestand pivot point as a mount.
Dink
 
thanks Dink.

It looks a little weird where it is. I may weld a anchor point on the frame.

I wonder why Suzuki went back to the swing mount link.

katman
 
Dink said:
If the torque link it attached to the swingarm it feeds it's torque into the swingarm effecting the suspension action, if it is attached to the frame and is at least as long as the swingarm it just floats there and allows the suspension to work properly.
My underslung caliper uses the centrestand pivot point as a mount.
Dink
Click to expand...

I don't want to cause an argument here, but surely you've got that the wrong way round? If the torque arm is on the frame, when you apply the brake it will try to pull the caliper towards the frame & so put an external force on the suspension movement?
I might be misunderstanding what you've written though!
If I'm wrong, I'll apologise now!!
 
I'm kinda with Paul here. The torque arm shouldn't affect the rear suspension because it's not anchored on any pivot point but on the pivoting part itself. Unless it causes some flexing on the right side of the swingarm on application of the brakes, I can't see any drastic alteration of suspension movement.
 
How tight should the bolts be on each end of the link? I'm trying to diagnose a grabby drum break. All I hear is a clunk and my back tire locks up. 8O The rear of the bike drops down a bit as this happens so I was figuring the link was part of the problem. I just about lost it 3 times today (raining) so I figure it's time to figure out what is going on.

Help, Steve :wink:
 
Steve - it sounds as if you have a problem with the brake. Hae you had it apart to check for worn out shoes or a cracked hub?
 
Swanny: I had the rear tire off recently replacing a tube and the parts are all in good shape. I'll have to try a few things tomorrow as I've noticed that the brake pedal hits the muffler while I am pushing on it. The brake sensor is also adjusted to the max so something is amiss.

Steve
 
With the torque arm attached to the swingarm, the braking forces the swingarm to rotate, pushing the pivot point in a downward motion. If it is attached to the frame this action would be eliminated, but all the pivot points should allow the caliper and torque arm to move back and forth as the swingarm compresses and rebounds. I don't know the pros and cons of either setup, so I would like to know more also.
Chris
 
Suzuki has gone back to a swingarm mount now so I am pretty confused and I guess so is Suzuki.

katman
 
I'm only taking a guess here, but it would seem to me that torque link attachments are designed so that the forces acting on the rear suspension cause it to "squat" upon application of the brake.

What do others think?

In relation to the bike depicted in the photo, if you look closely you will notice that the "line" of the torque link and the line between the swing-arm pivot and the rear axle appear to diverge from the rear to the front. This may cause the swing-arm to be pulled down when you apply the rear brake, so lifting the rear of the bike. You want to try and get the frame attachment as high as possible - so I reckon the revised, higher attachment point will be better for riding.

Pat
 
Pat,
do you think this location is better than lets say the center stand mounting brackets?

katman
 
the pic at the top of this page is has it attached to the center stand mounts. it was only there to keep it from dragging on the ground. I have talked to some guys who have used that local and there wasn't any mention of braking probs. Although I prefer this location for strength and it keeps relatively the same line as on the gsxr's.

katman
 
katman said:
Pat,
do you think this location is better than lets say the center stand mounting brackets?

katman
Click to expand...

I do.
You need to imagine the forces acting on the swing-arm when you apply the brake. With the set-up in your original photo, I'm convinced that the swing-arm will be pulled downwards, causing the the rear of the bike to lift - probably not the ideal situation :wink:

You want to get the link and the swing-arm parallel to each other at the very least. Ideally, you need the "line" of the link and the "line" of the swing-arm (hope you understand what I'm talking about) to converge from the rear to the front.

Pat
 
katman said:
the pic at the top of this page is has it attached to the center stand mounts. it was only there to keep it from dragging on the ground. I have talked to some guys who have used that local and there wasn't any mention of braking probs. Although I prefer this location for strength and it keeps relatively the same line as on the gsxr's.

katman
Click to expand...

And they could be right too... for most street riding you probably wouldn't notice any problems.

I'm only talking theory here, not practice.... :D

Pat
 
yeh,

I get you. With this config they would converge if you continue the line

katman
 
You need to keep the torque arm attaached to the swingarm, period.
 
Wouldn't venture to guess why Suzuki frame mounted the torque arm. But, if you mount it on the frame it is going to interfere with suspension movement. Once you tighten down on the axle the caliper can't rotate. If the torque arm is swingarm mounted it doesn't have to go anywhere as the suspension moves. Frame mounted it has to be able to rotate slightly with the suspension.
 
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