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Rotten GS550 swing arm. Any ideas?

  • Thread starter Thread starter Animal Mother
  • Start date Start date
A

Animal Mother

Guest
I'm stripping down a 550M to turn it into a cafe racer.

Sadly, I've discovered that the swing arm is rotten/rusted through on the plate near the pivot.

picture.php


Is there a direct replacement or (simple) upgrade or would I just have to repair or replace with the same one?
 
Replace it
lots show up on ebay.

I wonder how in hell that could rust like that. Was it used as a boat anchor?
 
JEEPRUSTY said:
I wonder how in hell that could rust like that. Was it used as a boat anchor?
Click to expand...

IIRC, that's area where the battery vent tube exits.
My guess is battery-acid attack; crummy reg/rect was overcharging/boiling the battery.

.
 
An 8-V 750 or 1000 arm might fit...?
Or possibly 16-V 750?
Some measurement involved.

8-V 550s were built in decent numbers. I'd think you could find one fairly easily.
Spares situation may be different in the UK, though.
Good Luck.

BTW - what's an "autojumble"? Seen that term in a few Brit mags, just curious.

.
 
Horror!

Horror!

Right. I took the swinging arm off today.

Unbelievable! I'm surprised the guy didn't crash and die.

85349.jpg

85352.jpg

85351.jpg

85350.jpg


There's a replacement on ebay (UK) but I don't think I could trust it.

What else fits?

How about:
GT750
GT550
GT380
GS750
 
If the swing arm is in that condition you'd better have a very close look at the frame!
 
Good idea...trouble is, they are bare, unpainted steel inside the tubing.

I recently saw a thread on another board of a newish Ninja 250 frame that just collapsed one day...rusted through from inside...looked fairly normal on the outside.
Definitely something to consider.

http://pnwriders.com/motorcycle-talk/154240-bike-disintegrated.html

I live in the NW USA...not called the Pacific Northwet for nothing! Rains here, a LOT, similar problems as you UK boys.

.
 
ronin1166 said:
Good idea...trouble is, they are bare, unpainted steel inside the tubing.

I recently saw a thread on another board of a newish Ninja 250 frame that just collapsed one day...rusted through from inside...looked fairly normal on the outside.
Definitely something to consider.

http://pnwriders.com/motorcycle-talk/154240-bike-disintegrated.html

I live in the NW USA...not called the Pacific Northwet for nothing! Rains here, a LOT, similar problems as you UK boys.

.
Click to expand...

Other than the failure that frame looks great.

I'll make sure I give it a good going over. :pray:
 
ronin1166 said:
An 8-V 750 or 1000 arm might fit...?
Or possibly 16-V 750?
Some measurement involved.

8-V 550s were built in decent numbers. I'd think you could find one fairly easily.
Spares situation may be different in the UK, though.
Good Luck.

BTW - what's an "autojumble"? Seen that term in a few Brit mags, just curious.

.
Click to expand...

Oops. Sorry,missed your post.

Yep, same as swap meet.

The trouble with spares over here is that we use salt on our roads so everything rots.:mad:
 
Animal Mother said:
The trouble with spares over here is that we use salt on our roads so everything rots.:mad:
Click to expand...


And a Island in the North Sea does not help either ..One thing Yanks don't see either ..Is in the UK its OK to ride a old Jap bike ..So people just dont give a old bike away for a $100 bucks .. In the USA if its not a H-D your a freak for riding a old Jap bike ...

(Best friends from Leeds UK .. I ship a mass of unrusted and unloved parts to the UK each year and have for 15 years ..To keep the UK boys riding ...)
 
Excellent result!!

Excellent result!!

:D
Managed to find a absolutely perfect (looks like NOS) swinger in Germany. It arrived yesterday.
?30 inc. postage. :D:D

Bearings and pins are perfect, sadly they need to come out for powder coating.

I take it they'll get wrecked when I remove them?
 
It I were you I would look at a late model GS500 twin swingarm. Aluminum & later model wheels & brakes too! Ray.
 
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