Manual petcock on kz750 csr?

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Manual petcock on kz750 csr?

24 Apr 2012 03:52
#517721
Just wondering if I can just replace the vacuum petcock on the CSR with a manual petcock, and if so would I just cap off the vac port that goes to the petcock? Thanks guys you are much help.

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  • AtLarge
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Re: Manual petcock on kz750 csr?

24 Apr 2012 08:57
#517739
Yes, you can and yes, you do. I don't use my stock vacuum petcock anymore. Never could get it adjusted right even with a rebuild kit. More trouble than it's worth and when it's turned off I know no gas is getting through.
1973 Honda CL70-K3
1975 Kawasaki 350 F9-C
1983 Kawasaki KZ750-K1
1994 BMW K1100RS
2008 Suzuki GSX1300-BKK8 #1120

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Re: Manual petcock on kz750 csr?

25 Apr 2012 00:13
#517928
Thanks AtLarge, that's what I figured but just wanted to make sure. yes I know what you mean about the vac petcock...no fun at all! :sick:

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  • AtLarge
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Re: Manual petcock on kz750 csr?

25 Apr 2012 00:19
#517930
Just a suggestion... Do a search on Fleabay for a seller named Brown Family Racing. He's got good ones. Reasonably priced. Work great. Contact him directly and he'll fix you up with one exactly for your bike.
1973 Honda CL70-K3
1975 Kawasaki 350 F9-C
1983 Kawasaki KZ750-K1
1994 BMW K1100RS
2008 Suzuki GSX1300-BKK8 #1120

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Re: Manual petcock on kz750 csr?

26 Apr 2012 00:51
#518130
Thanks again atlarge, found the brown family racing guy on ebay and he had some specifically machined for the kz750 csr so I got that on order and will let you know how it works out when I get it and hook it all up.

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  • martin_csr
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Re: -

26 Apr 2012 09:42 - 04 May 2015 15:47
#518166
Manual fuel valve.
If the bolt hole spacing is 34mm & I'm pretty sure it is on the CSR:
KZR topic - Manual fuel valve option
1981 KZ650 Competition Sports and Road
Last edit: 04 May 2015 15:47 by martin_csr.

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  • bcbobber
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Re: Manual petcock on kz750 csr?

26 Apr 2012 20:05
#518259
One more question. When i get the knew petcock do I just cap the vac tube on the petcock and the vac line going to the petcock and leave the two vac lines hooked to the carbs? Or do I cap all the vac lines up? I'm assuming the first, but just want to make sure.

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  • Patton
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Re: Manual petcock on kz750 csr?

26 Apr 2012 20:31
#518267
bcbobber wrote: One more question. When i get the knew petcock do I just cap the vac tube on the petcock and the vac line going to the petcock and leave the two vac lines hooked to the carbs? Or do I cap all the vac lines up? I'm assuming the first, but just want to make sure.

With the new petcock installed, remove the vacuum hose that's no longer needed, and cap/plug the vacuum nipple where the hose was removed.

All the vacuum nipples should now be capped/plugged.

Leave the two vent hoses alone. They must exit to open air, usually through hoses routed to underneath the seat or routed to underneath the bike.

Good Fortune! :)
1973 Z1
KZ900 LTD

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Re: Manual petcock on kz750 csr?

30 Apr 2012 02:18
#518757
So I should take the hose vac hose off the two carb nipples and the petcock nipple as well? Just want to make sure I understand you correctly. Then cap all three?

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  • AtLarge
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Re: Manual petcock on kz750 csr?

30 Apr 2012 08:27
#518771
I wouldn't. Either take the petcock vacuum hose, plug it and leave it dangle or take the line with the tee out and replce it with one solid piece from the carb to canister that is in the top of the air cleaner.
1973 Honda CL70-K3
1975 Kawasaki 350 F9-C
1983 Kawasaki KZ750-K1
1994 BMW K1100RS
2008 Suzuki GSX1300-BKK8 #1120

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  • Medina
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Re: Manual petcock on kz750 csr?

30 Apr 2012 08:37
#518773
I converted mine from vacuum to manual. A thread here details it.
Haven't had any problems with it. doesn't leak and cost was...less than a couple of bucks and wait time was overnight. I plugged the unneeded vacuum line with the same two part epoxy I used internally.

edit: gas tank designed two part epoxy ;)
1981 KZ1100 Vetter "Luminous Navy Blue" DAMN YOU COLOR CODES!
Medina, Oh
My Bike Thread
www.kzrider.com/forum/10-new-members/469298-from-ohio

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Re: Manual petcock on kz750 csr?

30 Apr 2012 20:20
#518887
Thanks that's what I was thinking as well at large. Just wanted to make sure because i got the petcock today and am going to hook it up tonight and see If I can get her fired up. :)

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