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1977 750B Twin. Vacuum Petcock or NO 21 Mar 2018 17:37 #780584

  • 650Dude
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on my 77 650 I dont have to remember to turn the petcock off. It operates by vacuum.

Does anyone know off hand if the 77 750B TWIN is vacuum also? Im out of town and left it in the "on" position....
1977 Kawasaki KZ650B
1977 Kawasaki KZ750 Twin

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1977 750B Twin. Vacuum Petcock or NO 21 Mar 2018 18:02 #780589

  • Scirocco
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If your needle valves are leaking fuel you need an oil change when you are back in town.

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1977 750B Twin. Vacuum Petcock or NO 21 Mar 2018 19:05 #780593

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So I assume the answer to whether it is vacuum operated is "no?"

The 650 manual reads just like the excerpt you posted, but it IS vacuum operated though the manual doesnt make that clear.
1977 Kawasaki KZ650B
1977 Kawasaki KZ750 Twin

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1977 750B Twin. Vacuum Petcock or NO 22 Mar 2018 05:04 #780608

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Your Petcock is not vacuum operated, he has NO diaphragm.

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1977 750B Twin. Vacuum Petcock or NO 22 Mar 2018 11:18 #780626

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1973 Z1
KZ900 LTD

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