KZ650 MY68 find correct rod bearings

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KZ650 MY68 find correct rod bearings

08 Feb 2020 09:13 - 08 Feb 2020 15:16
#818816
Dear guys
My name is Chris, 38 years old and from Austria.
I am turning a very bad 650 into a cafe racer. The lady has 130k KM run so I perform complete Motor revision.
Now I would like to order the spare parts but it am not able to find correct rod bearings. No sign on the rods or the crank visible. No colour code.
Many thanks
Cheers Chris

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Last edit: 08 Feb 2020 15:16 by Street Fighter LTD. Reason: Wrong subject

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Re: KZ650 MY68 find correct rod bearings

08 Feb 2020 15:09 - 08 Feb 2020 15:15
#818842

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Is that a colour code? Seems to be black. There should be also blue and brown sleeves available...
Last edit: 08 Feb 2020 15:15 by Street Fighter LTD.

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Re: KZ650 MY68 find correct rod bearings

08 Feb 2020 15:18
#818845
Welcome to KZRider
WOMTONG
I fixed all your pictures for you.
Next time hit the insert or insert all button before submitting
Dave

Original owner 78 1000 LTD
Mr Turbo Race Kit, MTC 1075 Turbo pistons by PitStop Performance , Falicon Ultra Lite Super Crank, APE everything. Les Holt @ PDM's Billet Goodies . Frame by Chuck Kurzawa @ Logghe Chassis . Deep sump 5qt oil pan. RIP Bill Hahn
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Re: KZ650 MY68 find correct rod bearings

08 Feb 2020 15:38
#818850

Thanks, but I know that thread and at the end nobody is sure....

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Re: KZ650 MY68 find correct rod bearings

08 Feb 2020 16:48
#818858
There are other threads on this as well. I think someone posted the part numbers for the later ZR7 bearings which interchange.

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Re: KZ650 MY68 find correct rod bearings

08 Feb 2020 17:56
#818861
My question is why did you take it apart? Everything looks good.
Steve
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Re: KZ650 MY68 find correct rod bearings

09 Feb 2020 01:04
#818880
SWest wrote: My question is why did you take it apart? Everything looks good.
Steve

Dear Steve
Basically that engine needs complete top end job. New pistons, new valves with guides. Due that I have decided to check also lower end. I have also to change primary chain as well the kick starter claws.

But you are right. I have not plastigage the rod bearings. I only want to make them new because of that over all big invest.

I think i will order some plastigage and see what will be the result. Additionally I will order new black sleeves and test them also with plastigage.

Good idea?
Many thanks and cheers

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Re: KZ650 MY68 find correct rod bearings

09 Feb 2020 17:43
#818921
Nessism wrote: There are other threads on this as well. I think someone posted the part numbers for the later ZR7 bearings which interchange.

I am positive I posted the info for using zr-7 rod bearings, as that is what I used in my motor. (Some of the kz rod bearings were out of stock at the time I tried to order them.)
BUT.....I am also positive that the kz bearings and the zr-7 bearing color to thickness coding are NOT the same!!!
A blue coded bearing will be a different thickness between the two models. I have that info buried in my computer somewhere I think but I can’t remember when or where I posted it.
So don’t try to order zr-7 bearings without doing the research.
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