petcock help please...

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28 Jun 2018 22:22 #786082 by cbrianroll
petcock help please... was created by cbrianroll
Need to convert from vacuum petcock to no vacuum for a project with a kz tank. I could weld a barb to tank and run an inline shutoff, but I would like a normal petcock to bolt right on. I've seen some generic ones on Ebay, but would like a tried and true one from someone who uses one. Pingels are spendy....but of I must lol. Many thanks, have a great day!

1980 kz550ltd

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29 Jun 2018 06:30 - 29 Jun 2018 06:35 #786088 by martin_csr
Replied by martin_csr on topic petcock help please...
Do you know what the bolt hole spacing is? It'll probably be either 44mm or 34mm. Most of them from the 70s are 44mm, but I'm not sure what size is most common in the 80s. my 81 650-CSR is 34mm.

Here's one that you can probably use. custom made in the USA. Be sure to check his other items, as he has various fuel valves.
If the mounting plate is the wrong size, the guy might have what you need or maybe he could make one real quick for you.
KZ650 etc MANUAL GAS TAP PETCOCK FUEL VALVE
Last edit: 29 Jun 2018 06:35 by martin_csr.

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29 Jun 2018 08:09 #786091 by 650ed
Replied by 650ed on topic petcock help please...
The mounting hole spacing on the stock 1977 KZ650 petcock is about 1.75 inches, and it is a manual petcock rather than a vacuum operated one. Ed


1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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29 Jun 2018 08:42 - 29 Jun 2018 08:42 #786096 by martin_csr
Replied by martin_csr on topic petcock help please...
44 mm = 1.73 in ...... :)
Last edit: 29 Jun 2018 08:42 by martin_csr.

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29 Jun 2018 17:28 #786109 by cbrianroll
Replied by cbrianroll on topic petcock help please...
Thanks guys, I'll have to measure it!

1980 kz550ltd

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10 Jul 2018 10:35 #786721 by SpecialGreen
Replied by SpecialGreen on topic petcock help please...
You can get a better measurement by measuring the distance between inside edges of the two holes (using the "outer diameter" hooks), plus the distance between the outside edges (using the "inner diameter" hooks)... divided in half.

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10 Jul 2018 14:18 #786728 by 650ed
Replied by 650ed on topic petcock help please...

SpecialGreen wrote: You can get a better measurement by measuring the distance between inside edges of the two holes (using the "outer diameter" hooks), plus the distance between the outside edges (using the "inner diameter" hooks)... divided in half.


Perhaps, but since the petcock came with 44mm or 34mm spacing one's measurements would need to off by 10mm to get the wrong petcock. That's more than 3/8" difference which is quite a lot. Ed

1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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