swingarm bushing question

M

max9505672

New Member
Hi,

I have a quick question for you guys.

I removed the swingarm on my 1982 CB125S, and now I'm not sure how to reinstall it correctly.

According to this schematic:

http://www.cmsnl.com/honda-cb125s-1982-usa_model7206/partslist/F++16.html#results

The fork pivot bolt (number 14) should be installed with 2 washers (20) and the self locking nut (16). I installed one washer on the head side of the pivot and the other one on the nut side of the pivot which seems pretty obvious.

My problem is when I tighten the self locking nut to the spec torque (30-40 Nm), the swingarm won't ''swing'' freely. There's a pretty strong resistance and all the swingarm rotates along with the pivot and the nut... I'm pretty sure this is not normal (the pivot should be fix and the swingarm moving around it).

What I don't understand is when I tighten the nut, both washers apply pressure on the collars in the rubber bushings which make the pivot and the collar move together. So in order for the swingarm to move independantly of the pivot, the collar should move as freely as possible from the rubber bushing, but it seems that the whole bushing assembly is one piece.. Am i wrong? Does the collar needs to rotate in the bushing with grease?

I'm not sure if my question is clear enough. If not, don't hesitate, I can clarify and add pictures if needed.

Thank you!
 
Are you sure that torque spec is correct? That's 32ft/lbs... Seems pretty high for such a small fastener.
 
That's what is written in my manual... I might be wrong though. What are the usual torques for the swingarm pivot?

This is what I mean by collars (where the washer apply pressure):
15x00oh.jpg
 
Those "collars" as you're describing are molded into the rubber bushing. If they're moving, then the bushings are bad.
 
Correct me if I'm wrong. When I tighten the swingarm bolt, the washers should apply pressure on the ''collars'' and since the ''collars'' are molded to the rubber, all these parts should rotate around the outer steel part of the bushing which is tight fitted right in the swingarm.

So the should be grease between the outer steel part of the bushing and the rubber?
 
Little brain dead today... Having trouble puttimg thoughts to keypad.

The bushing is all one piece. Outer sleeve, rubber and inner sleeve. It's not there to act as a pivot but to dampen forces applied to the swingarm. The swinger pivots in the frame. The bushings, pivot bolt amd swinger will move as one, pivoting up and down while the frame remains stationary.

As far as the swinger being stiff, and not "swinging" freely... Well, how stiff is it? Cam you easily move it up amd down by hand?
 
VonYinzer said:
Little brain dead today... Having trouble puttimg thoughts to keypad.

The bushing is all one piece. Outer sleeve, rubber and inner sleeve. It's not there to act as a pivot but to dampen forces applied to the swingarm. The swinger pivots in the frame. The bushings, pivot bolt amd swinger will move as one, pivoting up and down while the frame remains stationary.

As far as the swinger being stiff, and not "swinging" freely... Well, how stiff is it? Cam you easily move it up amd down by hand?
Click to expand...
no you got it kinda wrong
the center steel pieces of the rubber bonded bushing become one with the frame when the bolt is tightened ..there is no movement in the frame
the swingarm will have quite a bit of resistance swinging up and down the more it moves the harder it is to move because the movement is entirely dependent on twisting the rubber
it will want to return to whatever position it was in when the bolt tghtened
 
xb33bsa said:
no you got it kinda wrong
the center steel pieces of the rubber bonded bushing become one with the frame when the bolt is tightened ..there is no movement in the frame
the swingarm will have quite a bit of resistance swinging up and down the more it moves the harder it is to move because the movement is entirely dependent on twisting the rubber
it will want to return to whatever position it was in when the bolt tghtened
Click to expand...

Ya... What he said. Again, not firing on all cylinders today. No more typing. ;)
 
You must log in or register to reply here.

DTT Light or Dark

  • DTT Light

    • Spread the Love

    Back
    Top Bottom