Swing Arm Bushes

[Duccout]

Hi Kabi,

The pin looks quite corroded and so do the bushes, from what I can see. Is there any damage or burring at the ends of the pin? You could run around each end with a file to be sure, and clean up the pin with some emery cloth. A new pin may be a good idea, but obviously that is more cost.

Colin

[Kabi]

The pin seems to be ok on both ends, no damage etc. Maybe the sand paper will help.
But i'll check the link on top, about the bushing..

[Duccout]

Kabi, are the bushes and the pin the ones that were fitted to the bike? I ask because if they fitted together originally, then they should fit again!

[Kabi]

Kabi, are the bushes and the pin the ones that were fitted to the bike? I ask because if they fitted together originally, then they should fit again!

im sorry for late answer.
Yep, they are the same. I dismantled it, clean the pin and bushes. But, if i remember correctly, the movement was not smooth before
Hard to say if someone did something with it before, or it is "dead" thanks to age

What i can try is to sandpaper the pin properly, polish it, lube well with vaseline and will see if i will be able to hammer it back
Maybe i give a try to old hack i know from Jawa - put the pin to the fridge it helped sometimes.

What do you thing?

[Jordan]

If it is needed to make the movement easier, give more clearance.
But rather than making the steel pin smaller, you can make the bronze bushes larger.
A way to do this, if it is only a small amount, is to use a brake cylinder hone tool in a hand held drill.
Use kerosene or similar to lubricate when using it, and wash well before assembly to remove debris.
https://www.ebay.co.uk/c/1764181966

[Duccout]

Yes, my thoughts too. By hammering the pin in you may create ridges or burrs that make it harder to get the pin in. You could try a new pin, but if you do not wish to risk buying one that may not fit either, what about taking the pin and swinging arm to a small engineering company and ask them to gently ream the bushes out until the pin fits?

Colin

[Kabi]

well, both of it sounds good to me. Tomorrow i'll check how the bushing and pin look in detail (my memory is weak), i'll try to post a foto for analysis.

thank you guys

[Geordie]

If the pin moves freely in one bush at a time but is stiff in two then they are misaligned.

[Kabi]

Hey guys,

i made a few photos, posting it with note. hope it will show.
But now, i was thinking, how it work properly? Does the pin should be stiff/fixed in swingarm and move almost freely in frame? It sound logic to me, that pin is fixed in only one bushing (frame or swingarm).
Unfortunately, i'll be in garage tomorrow morning to check how the pin fit into frame bushing - i remeber badly, it is something similar to swingarm ~ stiff.

Geordie: i know. The main issue is, swingarm is stiff when i insert the pin. It was before i disasembly frame x swingarm.

[Duccout]

Hi Kabi,

the pin should slide freely through both bushings in the swinging arm, and is then clamped firmly in the frame so that the swinging arm pivots on the pin. It does not matter if the pin is stiff in the frame ( that is preferable to being loose). What Geordie says is a worry - if the pin slides easily into each bush but not both of them, then there is a possibility that the swinging arm pivot is bent and the two bushes are out of line, or the pin is bent. Are there any signs that the bike has been in a crash?

The bushes look good and you can check the straightness of the pin by rolling it on a flat surface. Check to see if the pin will slide easily through both bushes in the swinging arm, then take it out again and see if it will slide through both clamps in the frame without fitting the swinging arm. Have a look tomorrow and let us know what you find.

Colin