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Swing arm sleeve on my 82 GPz750

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Swing arm sleeve on my 82 GPz750 29 Feb 2016 15:09 #713115

  • GKBO
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The lack of any grease for YEARS left my swing arm sleeve looking bad and they're NLA from Kawasaki :P So in my search for a solution I came across this .The sleeve is as 22mm OD with a 16mm ID,fond this that would fit the bill but the $ 27.93CAD with shipping is a bit steep :blink:Any idea's on something less pricey?

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Last edit: by GKBO.

Swing arm sleeve on my 82 GPz750 29 Feb 2016 15:38 #713119

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Ya gotta do what ya gotta do.
Steve

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Swing arm sleeve on my 82 GPz750 29 Feb 2016 17:22 #713129

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I'd pass on that piece of tube. It's not ground for roundness like the OEM part. Using it will destroy the bearings in short order.

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Swing arm sleeve on my 82 GPz750 29 Feb 2016 18:41 #713138

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Can the old one be cleaned, polished and reused?
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

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Swing arm sleeve on my 82 GPz750 01 Mar 2016 03:16 #713169

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No the original sleeve has been grooved by the destroyed needle bearings so it's not a usable piece :( looks like the kit from England is my only option :dry:

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Swing arm sleeve on my 82 GPz750 01 Mar 2016 03:51 #713170

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I just remembered I have the sleeve of my abandoned KDX project,it's the same size .Thinking I'd just cut that in 1/2 and use it on the bearing ends and use the original cut to suit sleeve as a spacer.Was thinking about welding then together but don't think I need to bother..

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Swing arm sleeve on my 82 GPz750 01 Mar 2016 04:51 #713174

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You can save that sleeve by just welding in new metal and turning on a lathe.
Mine was just as bad.
Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires
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Swing arm sleeve on my 82 GPz750 01 Mar 2016 05:45 #713178

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YOu may want tocheck is your swing arms carries 2 or 4 bearings. Mine has 4 (2 each side).
Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires

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Swing arm sleeve on my 82 GPz750 01 Mar 2016 06:46 #713191

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Since the tube is contacting directly with the needle bearings it's important that it be smooth, round, and hard. You can weld the surface and grind to assure roundness, but it will be soft, not hard, thereafter.

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Swing arm sleeve on my 82 GPz750 01 Mar 2016 06:57 #713193

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I tought of that, but trust me. Sleeve metal is not hardened, form my experience it seems like SAE 1045. You could scracht it with anything. However I welded in Stainless Steels, wich is certainly harder. After turning in the lathe, I smoothed the surface with 400 and 600 dry sand grit.
Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires

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Swing arm sleeve on my 82 GPz750 01 Mar 2016 07:19 #713202

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300 series stainless is a lot softer then 1045 unless you used 400 series s.s and then heat treated it . 1045 can be heat treated to around 50 plus rockwell.
original owner of a 1984 gpz 750
1985 turbo 750 stock, being restored.
1984 gpz 750 with 810 cc wiesco's megacycle cams(471-10) 34 mm flatslides v&h pipe ported head dyna ignition. bottom end, crank case from turbo 750 and sprockets.

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Swing arm sleeve on my 82 GPz750 01 Mar 2016 07:26 #713203

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I do this all the time in my work. As you correctly pointed, 400 series was used.
You are right about tempering steel.
Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires
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