Welcome, Guest
Username: Password: Remember me
  • Page:
  • 1
  • 2

TOPIC:

Swing arm radial play, shaft diameter KZ1000 16 Nov 2022 10:59 #876892

  • Jonas_Z1000j
  • Jonas_Z1000j's Avatar Topic Author
  • Offline
  • User
  • Posts: 53
  • Thank you received: 9
Hi!

I have just started to assemble my KZ1000j -82 after work on the engine and a powder coat of the frame. A couple of years back, I changed the swing arm bearings and sleeves. I noticed now when I put the swing back on that it has a considerable radial play between the shaft and the sleeve. I pulled out the shaft just a bit and took a couple of measurements all between 14,3-14,5 mm. I google now that it should be 16 mm!? I read in the service manual that the service limit of the shaft is 0,7 mm.

Is 16,0 mm the correct shaft diameter?

thanks,

 
Z1000 J2 -82 not so running restoration object anymore
Z900RS -21 Green/Yellow

Please Log in or Create an account to join the conversation.

Swing arm radial play, shaft diameter KZ1000 16 Nov 2022 11:51 #876900

  • zed1015
  • zed1015's Avatar
  • Offline
  • User
  • Posts: 2512
  • Thank you received: 1065
The 1000j frame pivot and swingarm spindle are listed at 16mm the same as all the other Z900/1000/GPZ1100 and also the 650 and 750's.
In reality from new the spindle measures 15.8mm and the frame boss 16.2mm.
14mm on the spindle is some serious slack and will cause severe handling issues.

AIR CORRECTOR JETS FOR VM CARBS AND ETHANOL RESISTANT VITON CHOKE PLUNGER SEAL REPLACMENT FOR ALL MIKUNI CARBURETTORS
kzrider.com/forum/23-for-sale/611992-air-corrector-jets-





The following user(s) said Thank You: Jonas_Z1000j

Please Log in or Create an account to join the conversation.

Swing arm radial play, shaft diameter KZ1000 16 Nov 2022 12:05 #876903

  • Jonas_Z1000j
  • Jonas_Z1000j's Avatar Topic Author
  • Offline
  • User
  • Posts: 53
  • Thank you received: 9
Thanks, I will pull it tomorrow and take more measurements!

Is there a source for new ones, either NOS or replacements?

The bearings where basically stuck when I bought the bike, maybe that caused the severe wear.
Z1000 J2 -82 not so running restoration object anymore
Z900RS -21 Green/Yellow

Please Log in or Create an account to join the conversation.

Swing arm radial play, shaft diameter KZ1000 16 Nov 2022 12:07 #876904

  • Wookie58
  • Wookie58's Avatar
  • Offline
  • Sustaining Member
  • Posts: 1312
  • Thank you received: 553
I just popped out and measured my 82 "K" parts, spindle is 15.88 - 15.92 and the inner races (old parts) are 16 - 16.08. It seems strange that your spindle has worn unless the bearing have been seized at some point ( the inner race should do the moving on the needle rollers so there should be no reason for the spindle to wear ??)
1982 KZ1000 Ltd
The following user(s) said Thank You: Jonas_Z1000j

Please Log in or Create an account to join the conversation.

Swing arm radial play, shaft diameter KZ1000 16 Nov 2022 12:22 #876905

  • Jonas_Z1000j
  • Jonas_Z1000j's Avatar Topic Author
  • Offline
  • User
  • Posts: 53
  • Thank you received: 9
The bearing where seized when I changed them. Before I bought it 5 years ago, it had been sitting in a garage for like 10 years, So its still kind of strange that it has this wear.

I will recheck tomorrow, I used a digital caliper today, maybe if was off, but now when I know what to expect I can look more closely.

/Jonas
Z1000 J2 -82 not so running restoration object anymore
Z900RS -21 Green/Yellow
The following user(s) said Thank You: Wookie58

Please Log in or Create an account to join the conversation.

Swing arm radial play, shaft diameter KZ1000 17 Nov 2022 09:56 #876921

  • Jonas_Z1000j
  • Jonas_Z1000j's Avatar Topic Author
  • Offline
  • User
  • Posts: 53
  • Thank you received: 9
Hello,

I have measured the spindle again, and furthest out from the center on both sides (where it contacts the frame) its 15.5 mm and where the sleeves are its 15.4 mm. So still considerable wear but a far cry from 14.4. The digital caliper had a 1 mm dent furthest in for some reason. My analog one dont have that feature.

Should be replaced right?

thanks,
Z1000 J2 -82 not so running restoration object anymore
Z900RS -21 Green/Yellow

Please Log in or Create an account to join the conversation.

Swing arm radial play, shaft diameter KZ1000 17 Nov 2022 11:17 #876924

  • Wookie58
  • Wookie58's Avatar
  • Offline
  • Sustaining Member
  • Posts: 1312
  • Thank you received: 553
I would replace, that much slack will make the bike weave at speed 
1982 KZ1000 Ltd
The following user(s) said Thank You: Jonas_Z1000j

Please Log in or Create an account to join the conversation.

Swing arm radial play, shaft diameter KZ1000 20 Nov 2022 00:10 #876987

  • Jonas_Z1000j
  • Jonas_Z1000j's Avatar Topic Author
  • Offline
  • User
  • Posts: 53
  • Thank you received: 9
I have found a NOS part with a price tag of 60 USD. But... I am tempted to just buy an 16 mm axle and thread it. That would cost 10 USD and actually remove a bit more slack.
hmm...
Z1000 J2 -82 not so running restoration object anymore
Z900RS -21 Green/Yellow

Please Log in or Create an account to join the conversation.

Swing arm radial play, shaft diameter KZ1000 20 Nov 2022 01:42 #876988

  • Wookie58
  • Wookie58's Avatar
  • Offline
  • Sustaining Member
  • Posts: 1312
  • Thank you received: 553
You could make your own as long as you use a suitable grade of steel, but by the time you make it and zinc plate it etc I'm not sure how much you would save. Also don't forget there needs to be enough clearance for a layer of grease so it doesn't seize over time
1982 KZ1000 Ltd
The following user(s) said Thank You: Jonas_Z1000j

Please Log in or Create an account to join the conversation.

Swing arm radial play, shaft diameter KZ1000 20 Nov 2022 17:37 #877015

  • Ojisan rider
  • Ojisan rider's Avatar
  • Offline
  • Sustaining Member
  • Posts: 311
  • Thank you received: 48
Mine is 750, but when I removed my swingarm shaft, it looked OK but after sandblasting (I have a small blasting cabinet), it showed up with lots of rust pit. Guess it was covered with rust and grease that I couldn't see with just wiping it down.

Went online and found several shafts on evilbay and just bought one that looked the best. Blasted and now it look and work fine. Don't forget to replace the bearings and the seals at both end. Mine didn't come with one, so I also added a grease nipple. For my bike, sleeve were harder to find than the shaft.
82' KZ750-R1 cafe racer style. Clip-on, Rear set, Fork-Brace, Mikuni Flat-slide (forgot the size), Kerker.
84' GPz750 (basket case). everything are in pieces.
89' ZX750-H1 (ZX-7 Ninja). Resurrection project are on going with my KZ750. Everything is stock.
The following user(s) said Thank You: Jonas_Z1000j

Please Log in or Create an account to join the conversation.

Swing arm radial play, shaft diameter KZ1000 20 Nov 2022 17:57 #877016

  • Kelly E
  • Kelly E's Avatar
  • Offline
  • User
  • Never Give Up. Never Surrender
  • Posts: 85
  • Thank you received: 43
I wouldn't blast any of the internal swingarm parts. The sleeve has been hardened where the needle bearings ride. The hardened layer is very thin and you can blast it off and the pieces will wear quickly. I soak rusty swingarm bolts and sleeves in EvapoRust then inspect the parts for damage. Many times it is just surface rust and the parts are fine.
The Rust Bros. Garage Collection
1974 Honda CB550 K0
1975 Honda CB400F Super Sport
1977 Kawasaki KZ1000 LTD
1979 Honda CB750F Super Sport
1980 Suzuki GS1100E
1982 Honda CB900F Super Sport
1983 Honda CB1100F
1984 Honda Sabre 700
1984 Honda Interceptor 1000
And more

The following user(s) said Thank You: Jonas_Z1000j

Please Log in or Create an account to join the conversation.

Swing arm radial play, shaft diameter KZ1000 24 Nov 2022 11:17 #877155

  • Jonas_Z1000j
  • Jonas_Z1000j's Avatar Topic Author
  • Offline
  • User
  • Posts: 53
  • Thank you received: 9
Well I took Wookie advice and bought the new one, and im happy I did. It measures around 15,92 - 15,95. I installed it right away with new grease on the bearings (just 3-4 years old). What a difference! completely snug now, swingarm feels so good I want to take it to the track but... unfortunately its snowing and will do so for at least 4 months

 

But this is wierd, the old one measured between the sleeves:

 
It looks identical, same head etc.
Z1000 J2 -82 not so running restoration object anymore
Z900RS -21 Green/Yellow
Attachments:
The following user(s) said Thank You: Wookie58

Please Log in or Create an account to join the conversation.

  • Page:
  • 1
  • 2
Powered by Kunena Forum