kz750/650 cams

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07 May 2006 16:16 #45735 by kawsakiman
kz750/650 cams was created by kawsakiman
is there a difference in between 750 and 650 cams? will 750 cams in a 650 give any better performance at all or are they the same? sorry if this has been asked. i could not find it anywhere. i'm notoriouslly cheap.
someday i will be able to afford my kz habit.

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07 May 2006 20:39 #45808 by 77KZ650
Replied by 77KZ650 on topic kz750/650 cams
yes, direct swap, the 750 cams are a bit better
07 MDP Rookie of the Year
01 ZX-12R street/drag bike. 8.97 @155.7 pump gas, dot tires, no bars, no power adders. top speed in the 1/4: 161MPH

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08 May 2006 06:29 #45855 by agawam
Replied by agawam on topic kz750/650 cams
750 cam don't have the speedo gear

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08 May 2006 06:58 #45862 by rammy
Replied by rammy on topic kz750/650 cams
I found this a while back and I think it will clear up your question on what the cam specs would be and what would swap. As noted before the 750's cams DO NOT have a cam gear casted into them
321


Post edited by: rammy, at: 2006/05/08 10:00
The barn yard;77 Kz650B-1 Kaw(the fun one) & 89 classic hog.
Chicago area-south burbs
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08 May 2006 07:15 #45864 by rammy
Replied by rammy on topic kz750/650 cams
I also submitted a copy in the file base under non specific model cam specs.The 1 in the file base is easier to read.

The link kzrider.com/component/option,com_docman/.../gid,350/Itemid,231/
The barn yard;77 Kz650B-1 Kaw(the fun one) & 89 classic hog.
Chicago area-south burbs

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08 May 2006 08:48 #45880 by steell
Replied by steell on topic kz750/650 cams
agawam wrote:

750 cam don't have the speedo gear


Well. that is correct, they don't have a speedo drive gear on the cams, but as far as the tach drive gear, the 83-85 GPz750 cams don't have a tach gear cast on them, but the KZ750 exhaust cams do. I just looked at one to verify this.
Any KZ750 (or early GPz750) with a mechanical tach has the tach drive gear on the cam.
KD9JUR

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08 May 2006 11:02 #45904 by mariozappa
Replied by mariozappa on topic kz750/650 cams
Does there need to be any modifying to the intake or exhuast valves for use with the 750 cams in the 650 or is it a DIRECT drop in?
1977 KZ650C1
and the KZ650/KZ750 Conversion ;)

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08 May 2006 11:18 #45909 by steell
Replied by steell on topic kz750/650 cams
To use the KZ750 cams all you need to do it bolt on the KZ650 cam spockets, and of course the usual stuff like adjust the valve lash and make sure you have the cams lined up (in time).
Don't expect a large power increase though, probably 2-3 hp on an otherwise stock motor.
KD9JUR

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08 May 2006 11:19 #45910 by rammy
Replied by rammy on topic kz750/650 cams
Should be a drop in.Just make sure your valve springs are good and within specs for the larger cams.If not you might hear that dreaded noise when the valve hits the piston and tries to self distruct when you float the valves at high rpm with the oem stock 650 springs.
The barn yard;77 Kz650B-1 Kaw(the fun one) & 89 classic hog.
Chicago area-south burbs

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