Top steering head replacement KZ660b

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05 Jun 2012 03:47 #526993 by peterg
Top steering head replacement KZ660b was created by peterg
Bit of a disaster whilst fitting tapered bearings in steering. The collar on the top steering head that holds the fork snapped with metal fatigue.
Can any member advise me If the steering head stem is specific to the KZ650B or will other models fit.
It could widen my search range for a replacement part. I am certainly not going anywhere without one thats for sure.
Cheers

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05 Jun 2012 05:15 - 05 Jun 2012 07:05 #526996 by roy-b-boy-b
Replied by roy-b-boy-b on topic Top steering head replacement KZ660b
Can you post a picture?

Is this the piece that is notched for a spanner wrench? I'll look and see if I have extra. Roy

1979 LTD Street Fighter.1977 KZ1000
Last edit: 05 Jun 2012 07:05 by roy-b-boy-b.

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05 Jun 2012 07:49 #527005 by Patton
Replied by Patton on topic Top steering head replacement KZ660b

peterg wrote: Bit of a disaster whilst fitting tapered bearings in steering. The collar on the top steering head that holds the fork snapped with metal fatigue.
Can any member advise me If the steering head stem is specific to the KZ650B or will other models fit.
It could widen my search range for a replacement part. I am certainly not going anywhere without one thats for sure.
Cheers


Per kawasaki,com,
Part No. 44039-076
Description: HEAD,STEERING STEM
is used on the following models:

KZ650-B1 (1977)
KZ650-B2 (1978)
KZ650-B2A (1978)
KZ650-B3 (1979)
KZ650-C1 (Custom) (1977)
KZ650-C2 (Custom) (1978)
KZ650-C3 (Custom) (1979)
KZ650-D1 (SR) (1978)
KZ650-D1A (SR) (1978)
KZ650-D2 (SR) (1979)
KZ650-E1 (LTD) (1980)
KZ650-F1 (1980)

Info on kawasaki.com includes parts diagrams, part names, part numbers, models sharing same part, availability, etc. Here's a link for help with navigating the site and finding information.
kzrider.com/index.php?option=com_kunena&...w&catid=13&id=376734

Good Fortune! :)

1973 Z1
KZ900 LTD
The following user(s) said Thank You: peterg

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05 Jun 2012 08:04 #527006 by 650ed
Replied by 650ed on topic Top steering head replacement KZ660b
Which piece?

Attachment 00000_2012-06-05.jpg not found


1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Attachments:
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05 Jun 2012 09:59 #527026 by peterg
Replied by peterg on topic Top steering head replacement KZ660b
Thanks for your interest.
The part is no 6 in the parts diagram. The bit that snapped was the hole where the actual fork ( No 9 in diagram) goes in.
Cheers
Pete

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05 Jun 2012 10:24 #527031 by 650ed
Replied by 650ed on topic Top steering head replacement KZ660b

peterg wrote: Thanks for your interest.
The part is no 6 in the parts diagram. The bit that snapped was the hole where the actual fork ( No 9 in diagram) goes in.
Cheers
Pete


In that case Patton's list and part number should work for you. Here's a new old stock one that you won't need to worry about being tweaked:

parts-4-sale.com/index.php?route=product...duct&product_id=2213

Be sure to use torque wrenches to ensure proper tightness without overstressing anything.

1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
The following user(s) said Thank You: peterg

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05 Jun 2012 10:54 #527037 by roy-b-boy-b
Replied by roy-b-boy-b on topic Top steering head replacement KZ660b
Are you talking about the top of the triple tree?

1979 LTD Street Fighter.1977 KZ1000

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05 Jun 2012 18:53 #527094 by peterg
Replied by peterg on topic Top steering head replacement KZ660b
Yes Roy that's the culprit.
Thanks for the list Patton it gives me a wider range now.
Thanks for the link 650ed I will follow it up

Appreciate your help guys. These old units are a bit rare down here in Tasmania Aus.
Cheers Pete

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12 Jun 2012 23:32 #528687 by peterg
Replied by peterg on topic Top steering head replacement KZ660b
Thanks for you info . Just an update. Problem fixed, Took steering head to an engineers shop and they welded the break and re milled the fork hole all good and bike up & running again.
Cheers from Tasmania

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12 Jun 2012 23:45 #528689 by 650ed
Replied by 650ed on topic Top steering head replacement KZ660b
Good luck with it. Personally, a welded triple tree would make me nervous. Ed

1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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13 Jun 2012 03:07 #528751 by peterg
Replied by peterg on topic Top steering head replacement KZ660b
Thanks Ed. I too had some concern but affter discussing the issue in the engineer shop I am ok with it.
Now another question for the forum, on the road test the bike displayed a small oscillating effect from side to side at low speed. Would this be due to over tightening of the new steering head bearings? I felt like I had been in a boat after the test ride. I also noticed I had the front wheel a bit tight as well which might have an effect?.?
Cheers

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