Rear shock absorber posts stripped

[ukjules]

I have on one side 2 rear shock absorber posts stripped.
The threads have not been great since i had this bike but I wanted to see once and for all
if they were ok . They are now stripped and i cannot get them back tapping and dieing.

GS550E 1980

They are both m10 * 1.25 threads and the main post is 12mm dia.
The m10 * 1.25 thread is now stripped on both.

I have run a tap in the bolts and a die on the threads and they wont tighten.

What on earth can I do now ?
I am not a welder.
I have restored many bikes and this is a first for me - and all this on my favorite bike.

[mrbill5491]

I have on one side 2 rear shock absorber posts stripped.
The threads have not been reat since i had this bike but I wanted to see once and for all
if they were ok . They are now stripped and i cannot get them back tapping and dieing.

GS550E 1980

They are both m10 * 1.25 threads and the main post is 12mm dia.
The m10 * 1.25 thread is now stripped on both.

I have run a tap in the bolts and a die on the threads and they wont tighten.

What on earth can I do now ?
I am not a welder.
I have restored many bikes and this is a first for me - and all this on my favorite bike.

Same thing happened to me on my top posts. I just downsized them with a die. Been like that for years now.

[ukjules]

so go to a m9 * whatever.
What about the nut ? did you find one suitabke ?

[steve murdoch]

Some good info in this thread.

http://www.thegsresources.com/_forum/showthread.php?202923-Stripped-rear-shock-mount

[ukjules]

ok so i need to find out if there are domed m9 nuts ?

Has anyone who has done this found any suitable nuts ?
also the m9 die ?

As my thread is m10*1.25 the next one down is m9 - one i have never heard of ?

[mrbill5491]

so go to a m9 * whatever.
What about the nut ? did you find one suitabke ?

I just used a regular ole nut.

[mrbill5491]

Some good info in this thread.
http://www.thegsresources.com/_forum...ar-shock-mount

Pretty much what I did.

[ukjules]

Damned annoying this as was the previous owners ham fisted mechanics years ago's fault.

So original thread was : m10 * 1.25

I have found dies for m9 * 1 or 1.25.
I will first find a nut that looks ok'ish, check the thread then get the die.

Ill take a pic of before and after and update - when i get to work.
thanks for info and letting me know others have sorted this !

[ukjules]

Q) As i am going from m10 to m9, any advice on doing so ?
Do i file down the original thread area a bit ? or just thread directly over the old thread ?

[Tom R]

I'd think if you used a m9 x 1.25 die, you could just go over the old threads.

[Rijko]

i have the same problem on one of my bikes,
thread was repaired before and was M6.
I will not go smaller so i will remove the studs
and weld in new ss ones.

Like these :

s-l1600.jpg

I am NOT affiliated to the seller in any way but here's the link

http://www.ebay.co.uk/itm/Suzuki-GT750-stainless-steel-rear-shock-mounts-/222254381025

If this stud does not fit i think he will do a custom job for the GS

[ukjules]

I have a M9*1.25 die ordered from.ebay.
I have 2 M9*1.25 nuts ordered from a citrean club.

I think bicycle front axle nuts are M9* 1.0 , will
check but they are domed too.

I know a machine works that could make the exact same
posts. It must be simple to lathe and thread these. I'd have to find a welder to attach it mind.
This is the last resort but hell these old bikes need some care don't they.
Of all my bikes my GS is the one I have not done a nut and bolt
mechanical restore on so I am.bound to find these issues.

[storm 64]

You learn something everyday. I deleted my post. 👍

[ukjules]

Update on the issue:

With some washer swapping and changing I managed to use
the very last bits of thread and now the rear shocks are secure
and with care I think can be taken off at will.

Cheers for advice.
At least now I have the tooling and nut form the one size down
method re thread. And as you say as original was 10*1.25
9*1.25 would go straight over.

@rijko , I'd be very interested how to get on with your fix ?
Post here how you sorted it when you do ?

[Rijko]

@rijko , I'd be very interested how to get on with your fix ?
Post here how you sorted it when you do ?

will do and post results !