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kz650 vs kz1000 triple difference

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18 Jul 2007 13:42 #157788 by galaxian
kz650 vs kz1000 triple difference was created by galaxian
Anyone know if a 79 kz650c3 has the same triples and stem as a 1977 kz1000a1??

Mainly i need to know if the stems are the same in diameter and length.

Post edited by: galaxian, at: 2007/07/18 17:04

1977 KZ1000A1, 1979 KZ650 C3

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18 Jul 2007 16:03 #157812 by OnkelB
Replied by OnkelB on topic kz650 vs kz1000 triple difference
The stems are the same diameter and use the same set of tapered bearings, but I don´t know for sure if they´re the same length.

Here´s a link to a steering stem bearing list I compiled a while back, hope it helps you some:

Kawasaki steering stem bearings chart

As for the triples I believe the forks (inner tubes) are different diameters which would make the triples different, the 650s have 36 mm inner tubes, not sure about the 1000s, but off the top of my head I think they have 41 mm inner tubes?

Post edited by: OnkelB, at: 2007/07/18 19:08

77 KZ 650 B1, 82 GPz 1100 B2.

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18 Jul 2007 16:25 #157813 by steell
Replied by steell on topic kz650 vs kz1000 triple difference
77-80 KZ1000, 76-80 (and maybe later) KZ650, and 76-80 (and maybe later) KZ750 twins, all have 36mm fork tubes, as does the 80-83 KZ750 four.

There are probably others that I missed.

KD9JUR

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18 Jul 2007 16:42 #157814 by Zthou1977
Replied by Zthou1977 on topic kz650 vs kz1000 triple difference
According to my former mechanic (he closed up his shop years ago) the geometry of both triple trees is slightly different. He used to say that a fitting a Z650 tree to a Z1000 would significantly improve handling.
I've got both sets lying around somewhere. If I can find them (tomorrow, 'cause its getting rather late), I'll check them for differences.

Post edited by: Zthou1977, at: 2007/07/18 19:43

1977 Z1000A1, 1982-1986 KZ1000P (built from two piles of parts), Moto Martin Z1200 (trying to get it registered), 1977 Z650B1
Utrecht, The Netherlands

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19 Jul 2007 01:52 #157878 by OnkelB
Replied by OnkelB on topic kz650 vs kz1000 triple difference
steell wrote:

77-80 KZ1000, 76-80 (and maybe later) KZ650, and 76-80 (and maybe later) KZ750 twins, all have 36mm fork tubes, as does the 80-83 KZ750 four.

There are probably others that I missed.


Ok, my bad, thanks for clearing that up, Steell.

77 KZ 650 B1, 82 GPz 1100 B2.

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19 Jul 2007 05:59 #157901 by galaxian
Replied by galaxian on topic kz650 vs kz1000 triple difference
guys thanks for your replies. Really i just need to know if the length of the stems is the same. The reason is that i pressed in my kz650 stem into the zx9 triples but now want to fit that to the kz1000 instead.

confussed???;)

1977 KZ1000A1, 1979 KZ650 C3

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19 Jul 2007 11:59 #157989 by Zthou1977
Replied by Zthou1977 on topic kz650 vs kz1000 triple difference
Just checked a Z650 triple with a Z1000A1 triple: the stems are identical, so you should be okay.
With regards to the other stuff:
- fork tube diameters are the same
- steering stops match
- trail is different. According to my former mechanic it is 90mm versus 108mm. His bike is featured in the 'Specials' section of the Dutch Kawasaki club:
www.kawasakimerkclub.nl/
goto Specials -> Specials 1 t/m 10 -> Big Z Z1000
It's an awesome bike.

1977 Z1000A1, 1982-1986 KZ1000P (built from two piles of parts), Moto Martin Z1200 (trying to get it registered), 1977 Z650B1
Utrecht, The Netherlands

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20 Jul 2007 06:11 #158229 by galaxian
Replied by galaxian on topic kz650 vs kz1000 triple difference
zthough1977,

Big thanks for checking!!;)

1977 KZ1000A1, 1979 KZ650 C3

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19 Nov 2021 14:55 #858082 by Samminorwich
Replied by Samminorwich on topic kz650 vs kz1000 triple difference
Can you fit kz650 fork bottoms to kz1000a tubes 
reSamantha

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21 Nov 2021 08:50 #858144 by zed1015
Replied by zed1015 on topic kz650 vs kz1000 triple difference

Can you fit kz650 fork bottoms to kz1000a tubes 
reSamantha
Yes! 
 

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21 Nov 2021 09:13 - 21 Nov 2021 09:31 #858149 by Mikaw
Replied by Mikaw on topic kz650 vs kz1000 triple difference
The post eludes me but this was discussed just recently. The 650 has more offset, or something. The OP (in the post that eludes me) was trying to figure out why the fork tubes didn’t line up. Turns out he had one 650 yoke and one 1000/900 yoke (don’t remember which was which). A member here mentioned that switching a 1000/900 to a 650 upper and lower was an old road racing trick to help handling. 


EDIT, Found the post.  www.kzrider.com/forum/5-chassis/616347-s...d-head-issues#853318

1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.
Last edit: 21 Nov 2021 09:31 by Mikaw.

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  • hardrockminer
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21 Nov 2021 12:40 #858161 by hardrockminer
Replied by hardrockminer on topic kz650 vs kz1000 triple difference
They are the same diameter.  The total length of KZ1000 vs KZ650 forks is the same but the 650 has longer lowers and shorter uppers.  You will have to check the dampers to ensure they will work.

I have several restored bikes along with a 2006 Goldwing with a sidecar. My wife has a 2019 Suzuki DR 650 for on and off road.

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