taller rear wheel on KZ750 CSR

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08 Feb 2012 02:31 #502745 by agreendrop
taller rear wheel on KZ750 CSR was created by agreendrop
I recently picked up an '82 kz750 CSR which is about to undergo a cafe transformation. It's got quite a cruiser stance at the moment, and I'm planning to lower the front and raise the rear for a more sporty stance.
There are a few things I'd like to do to achieve this:

1. Lower the front forks, either by adding a spacer or just adjusting at the tree. The front end is a bit squishy, so would spacers help/hurt that?

2. Longer rear shocks.

3. Taller rear wheel.

I'm specifically trying to get information on the rear wheel in this thread (although any help on the other points would be appreciated).

I've got a laced rear wheel with a drum at the moment, not sure the size off the top of my head, but smallish (see photo below). Would it be possible to find a complete wheel that is the desired size, or would I be better off finding a rim and having the hub laced up to that? I have no idea where to find a rim or what it costs to have it laced up.

Any help on this is appreciated. Thanks!

kzrider.com/forum/new-topic/5-chassis#

Andy

1982 KZ750 CSR
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08 Feb 2012 09:44 #502760 by roy-b-boy-b
Replied by roy-b-boy-b on topic taller rear wheel on KZ750 CSR
I might be wrong here but I think I have read on this site where the height will be similar because of the height of the side wall of the tires.
In other words the ride height is not going to change much.

1979 LTD Street Fighter.1977 KZ1000

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08 Feb 2012 10:26 - 19 Feb 2013 12:50 #502771 by martin_csr
Replied by martin_csr on topic -
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Last edit: 19 Feb 2013 12:50 by martin_csr.

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08 Feb 2012 11:15 - 08 Feb 2012 11:21 #502775 by 650ed
Replied by 650ed on topic taller rear wheel on KZ750 CSR

roy-b-boy-b wrote: I might be wrong here but I think I have read on this site where the height will be similar because of the height of the side wall of the tires.
In other words the ride height is not going to change much.


Good point! Notice in the excerpt below from the Dunlop website that the diameter of the 16" stock tire (130/90-16) is 25.16” and the diameter of an 18" 120/90-18 tire is 26.44”. That’s only 1 ¼” difference in diameter which means the height difference is only 5/8”. Not much for the cost and level of effort required to make the change. Ed

Attachment reartirediameters2.jpg not found


1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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Last edit: 08 Feb 2012 11:21 by 650ed.

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08 Feb 2012 17:07 #502817 by Patton
Replied by Patton on topic taller rear wheel on KZ750 CSR

1973 Z1
KZ900 LTD
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09 Feb 2012 00:21 #502906 by agreendrop
Replied by agreendrop on topic taller rear wheel on KZ750 CSR
Thanks for the info, guys!
I'm planning on getting an 18" rear wheel anyway, not just for the height difference, but mainly because I dislike the look of the 16". Since it doesn't really affect the height, then I'll just get some longer rear shocks for now until I can get the wheel figured out. If anyone happens to have an 18" 40 hole rim or rear wheel assembly that will work, let me know!

As far as the front fork, is it hard to rebuild? I'm also toying around with the idea of putting a modern sportbike fork and tree. Anyone know what fits nicely, or concerns that should consider?

Thanks!

Andy

1982 KZ750 CSR

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09 Feb 2012 15:37 - 09 Feb 2012 15:38 #503016 by Kapahulu
Replied by Kapahulu on topic taller rear wheel on KZ750 CSR
I think you will find the handling improved with an 18" back tire. I have a KZ1000 LTD and the 16" rear tire kind of looks like a car tire - a flat profile. It handles like a dog compared to my other KZ's with 18" rear tires.

I find the hardest part about taking a fork apart is disconnecting the damper rod. I have it down for KZ1000's with a tool I made. I recently tried to take a KZ900 fork apart and found the "nut" at the bottom inside of the fork is different and I need something else to hold it in place.

You'll need to check and see how to take the KZ750 for apart or just take it to a motorcycle shop. The last time I did that they charged me $50 bucks though.

1978 KZ1000, 1976 KZ900, 1975 H2, 1973 H1, 1973 H2, 1978 RD400, 1977 RD400, 1974 RD350
2strokeworld.com
Last edit: 09 Feb 2012 15:38 by Kapahulu.

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09 Feb 2012 16:12 - 19 Feb 2013 12:50 #503026 by martin_csr
Replied by martin_csr on topic -
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Last edit: 19 Feb 2013 12:50 by martin_csr.

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22 Feb 2012 23:50 #505798 by 82gypsy750
Replied by 82gypsy750 on topic taller rear wheel on KZ750 CSR
Hello, everyone. Please bear with me, as I'm new to the Asian bike scene... I recently acquired a 1982 KZ750r1 (GPZ750). It has an 120/90-18" on the rear. It's just too much muscle for this tire. I've been considering swapping to a 130 or 140 with a 16" wheel. Any input regarding swap-ability? If it'll be a direct swap, I may even be willing to trade for a 16" wheel ;-)

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