Hello Guest User,

Please feel free to have a look around the forum but be aware that as an unregistered guest you can't see all of it and you can't post.

To access these 'Registered Users Only' areas simply register and login.

Worn or Worn Out?

Need help restoring, building, or finding then try here.

Moderators: chrisu, paul doran, Taffus, KeithZ1R

Message
Author
Blackseven
100Club
100Club
Posts: 118
Joined: 25th Oct 2017
Location: stockport

Worn or Worn Out?

#1 PostAuthor: Blackseven » Sat Jan 06, 2018 8:00 pm

I started to reassemble the bottom end of my engine and gearbox today and noticed some strange looking wear on the input shaft first gear (the one that is part of the shaft). I've tried to attach a photo - the wear actually looks a lot worse in the photo than real life but there are little ridges on the face of each tooth that can be felt with a finger nail so I presume the shaft should be replaced? All of the other gears look fine including the corresponding first gear on the layshaft.

Has anyone come across this before? Has anyone got a decent input shaft they want to sell for a Z1000A1/2? I've seen one one Ebay listed as a Z1/Z900/Z1000 shaft but are they all exactly the same?

Thanks! Rob
Attachments
IMG_5939.JPG

User avatar
z1bman
Hardcore
Hardcore
Posts: 4671
Joined: 3rd Mar 2010
Location: WORDSLEY WEST MIDLANDS

Re: Worn or Worn Out?

#2 PostAuthor: z1bman » Sat Jan 06, 2018 8:23 pm

the shaft is fitted to all these models


KZ1000-A1 KZ1000 (1977)
KZ1000-A2 KZ1000 (1978)
KZ1000-A2A KZ1000 (1978)
KZ1000-A3 KZ1000 (1979)
KZ1000-A3A KZ1000 (1979)
KZ1000-A4 KZ1000 (1980)
KZ1000-B1 KZ1000 LTD (1977)
KZ1000-B2 KZ1000 LTD (1978)
KZ1000-B3 KZ1000 LTD (1979)
KZ1000-B4 LTD (1980)
KZ1000-C1 Police 1000 (1978)
KZ1000-C1A Police 1000 (1978)
KZ1000-C2 Police 1000 (1979)
KZ1000-C3 Police 1000 (1980)
KZ1000-C4 Police 1000 (1981)
KZ1000-D1 Z1R (1978)
KZ1000-D3 Z1R (1980)
KZ1000-G1 Classic (1980)
KZ900-A4 (1976)
KZ900-A5 (1977)
KZ900-B1 LTD (1976)
Z1 Z1 (1973)
Z1-A Z1 (1974)
Z1-B Z1 (1975)

User avatar
ADRIAN H
Hardcore
Hardcore
Posts: 4528
Joined: 21st Mar 2009
Location: Charminster. Bournemouth

Re: Worn or Worn Out?

#3 PostAuthor: ADRIAN H » Sat Jan 06, 2018 8:25 pm

I Don’t know much about gear shafts. But that shaft does look mullered.
adrianhorsfield@live.co.uk
Sunny Bournemouth. Dorset. UK.

User avatar
popsA1
100Club
100Club
Posts: 134
Joined: 7th Jun 2009
Location: Leamington Spa

Re: Worn or Worn Out?

#4 PostAuthor: popsA1 » Sat Jan 06, 2018 10:15 pm

It's difficult to tell from the photo but I'd guess there's an imperfection in the hardening causing the the surface to break up.
Either way, you need a fresh one.
And if the corresponding output gear shows any ware marks l'd replace it as well.
A2 1979-80. A1 1980-now

Blackseven
100Club
100Club
Posts: 118
Joined: 25th Oct 2017
Location: stockport

Re: Worn or Worn Out?

#5 PostAuthor: Blackseven » Sat Jan 06, 2018 10:47 pm

Thanks all - good advice, I'm on the trail of a replacement shaft.

Rob

Mr Bump
100Club
100Club
Posts: 382
Joined: 30th Dec 2015

Re: Worn or Worn Out?

#6 PostAuthor: Mr Bump » Sun Jan 07, 2018 7:50 am

I’ve probably got one, Ive got a whole gearbox less I think fifth gear cogs. I’ll have a look in my stash later on.

Olly
'In your twenties you think you are immortal, in your thirties you hope you are immortal, in your forties you just hope it doesn't hurt too much'

Lemmy

Blackseven
100Club
100Club
Posts: 118
Joined: 25th Oct 2017
Location: stockport

Re: Worn or Worn Out?

#7 PostAuthor: Blackseven » Sun Jan 07, 2018 11:01 am

Cheers Olly that would be great.

Rob

Mr Bump
100Club
100Club
Posts: 382
Joined: 30th Dec 2015

Re: Worn or Worn Out?

#8 PostAuthor: Mr Bump » Sun Jan 07, 2018 8:47 pm

Hello mister,

Had a look - the spare one I’ve got is showing similar wear, though possibly not quite as bad. I guess it’s not an uncommon issue.

According to t’internet its adhesive wear, the marks are caused by the two load bearing faces momentarily welding together under load, likely caused by poor lubrication. Crap oil then, or car engine oil maybe?

Anyway, you are welcome to my gearbox bits if you want them, tho expect you’ll want to find something mint if you can.

Olly
'In your twenties you think you are immortal, in your thirties you hope you are immortal, in your forties you just hope it doesn't hurt too much'



Lemmy

Blackseven
100Club
100Club
Posts: 118
Joined: 25th Oct 2017
Location: stockport

Re: Worn or Worn Out?

#9 PostAuthor: Blackseven » Sun Jan 07, 2018 11:44 pm

Thanks for the offer but I’ll look out for something with no wear on the tooth faces.

Rob


Return to “Bike Help”

Who is online

Users browsing this forum: Gray17 and 41 guests