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Gearboxes

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Zed1/21
new poster
Posts: 14
Joined: 25th Feb 2020
Location: Glasgow

Gearboxes

#1 PostAuthor: Zed1/21 » Mon Nov 09, 2020 2:18 pm

Hi there,
Does anybody know if a gpz1100 gearbox cluster fits straight into a z1000 a2?

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Pigford
I'm on prescription!!
Posts: 10566
Joined: 2nd Jan 2006
Location: Hampshire Coast UK

Re: Gearboxes

#2 PostAuthor: Pigford » Mon Nov 09, 2020 2:46 pm

No it doesn't!

But can be done at a cost - change of bearings & bits - someone with more details will be along soooooon!
And on the 7th day... Zeds were created!

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zed1015
Hardcore
Hardcore
Posts: 3798
Joined: 2nd Nov 2005
Location: Somewhere between Scunny and Goole.

Re: Gearboxes

#3 PostAuthor: zed1015 » Mon Nov 09, 2020 3:40 pm

Been there, done that and as above, not a straight swap and not really needed .
Depending on model of GPZ you need a J input shaft bored out at the threaded end to accept the Z clutch pusher, Output bearing conversion and spacer for the larger dia output shaft , clearance to the selector drum , attached selector fork and a diameter reduction of 3rd gear as well as shimming the cluster to ensure correct centralisation of the cluster and forks to avoid selecting two gears at once.
On top of that the tooth form and ratios are different to the original cluster so you lose the option of using the kickstart too.
If you were to do it the only gearbox worth using for the conversion is the 1100A unitrack as this has the strongest tooth form and is the only one with a factory undercut.

Zed1/21
new poster
Posts: 14
Joined: 25th Feb 2020
Location: Glasgow

Re: Gearboxes

#4 PostAuthor: Zed1/21 » Tue Nov 10, 2020 1:19 pm

Hi thanks for that,
Too big a job as you say .i’ll just replace
D89239D3-B882-431C-A6AA-B3214DE67DD7.png
Could have been worse!on motorway
standard shaft


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