81 KZ650 sprocket question

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02 Sep 2009 14:55 #318636 by Phildo
81 KZ650 sprocket question was created by Phildo
I'm going to be replacing chain and sprockets on my 81 KZ650, is there any other sprockets that will work aside from OEM replacement?

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02 Sep 2009 15:11 #318639 by bountyhunter
Replied by bountyhunter on topic 81 KZ650 sprocket question
Phildo wrote:

I'm going to be replacing chain and sprockets on my 81 KZ650, is there any other sprockets that will work aside from OEM replacement?

There are an assortment of different sprockets available if you want to change the gear ratio. Z1 sells them along with chains at very good prices.
1979 KZ-750 Twin

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02 Sep 2009 16:34 #318655 by Phildo
Replied by Phildo on topic 81 KZ650 sprocket question
Z1? Could you provide a link? Sorry, I'm new to bikes :)

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02 Sep 2009 16:44 #318660 by timebomb33
Replied by timebomb33 on topic 81 KZ650 sprocket question
z1 enterprises don't know how to do anything better than that those guy's sell everything you could every want for your kawi.
1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE

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02 Sep 2009 16:51 #318663 by Phildo
Replied by Phildo on topic 81 KZ650 sprocket question
Thanks man!

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02 Sep 2009 17:42 #318675 by Phildo
Replied by Phildo on topic 81 KZ650 sprocket question
another question...what about changing to a belt drive instead of chain? is it possible?

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03 Sep 2009 04:34 - 03 Sep 2009 04:38 #318804 by JMKZHI
Replied by JMKZHI on topic 81 KZ650 sprocket question
No, most likely. A shaft conversion might be possible.
As for the sprockets, a bigger front 630 sprocket on the CSR will be a tight fit. A 530 chain & sprockets might work better. Although I don't know much about this sort of thing, I wouldn't go smaller than a 30T rear, assuming you don't change the front 13T.
Last edit: 03 Sep 2009 04:38 by JMKZHI.

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03 Sep 2009 08:50 #318847 by Phildo
Replied by Phildo on topic 81 KZ650 sprocket question
Okay, I wasn't too sure about the belt drive, thought I'd toss it out tho.

As for the chain, I'm gonna change out to a 530, just need to figure out what sprockets are needed

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03 Sep 2009 10:33 #318872 by MFolks
Replied by MFolks on topic 81 KZ650 sprocket question
Some sprocket suppliers:

www.sprocketspecialists.com/
www.sunstar-mc.com/home.aspx
www.rebelgears.com/
www.schnitzracing.com
www.jtsprockets.com
www.pmfronline.com


A website for figuring ratio's

www.gearingcommander.com
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)

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03 Sep 2009 11:14 - 03 Sep 2009 11:18 #318880 by Phildo
Replied by Phildo on topic 81 KZ650 sprocket question
Ok, maybe somebody can verify this info for me. OE front sprocket has 14 teeth while rear has 33 with an 84 link chain. Going by the 630 to 530 conversion guide on Z1, to retain stock ratios, I would swap to a 17 tooth front and 41 tooth rear (keeping the 13 tooth spline up front) with a 101 link chain.

Is this correct?
Last edit: 03 Sep 2009 11:18 by Phildo.

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03 Sep 2009 12:47 #318899 by JMKZHI
Replied by JMKZHI on topic 81 KZ650 sprocket question
The 81 KZ650-H1 CSR came stock w a 13T Fr & 33T Rr sprockets and 630x84 chain.

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03 Sep 2009 12:57 - 03 Sep 2009 12:58 #318902 by bountyhunter
Replied by bountyhunter on topic 81 KZ650 sprocket question
Phildo wrote:

front sprocket has 14 teeth while rear has 33 with an 84 link chain. Going by the 630 to 530 conversion guide on Z1, to retain stock ratios, I would swap to a 17 tooth front and 41 tooth rear (keeping the 13 tooth spline up front) with a 101 link chain.

That's the equivalent ratio to stay close to what you have, which apparrently is one tooth up from stock on the front. Lots of people go up one on the front because these bikes are all geared too low stock.
1979 KZ-750 Twin
Last edit: 03 Sep 2009 12:58 by bountyhunter.

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