Fuel Overflow On My stock 77 KZ650 B1

ezrider714 wrote: Vacuum petcocks are junk,always have been always will be.
Invented for lazy yuppies, if you can't turn the petcock off when you park, you have no business riding a bike :whistle:

I would like to run my stock gravity fed original petcock. However, there is a small spring missing as stated earlier. This causes the petcock to leak fuel past the petcock and flood the carb float bowls. If you have a spare spring that fits the petcock I will gladly accept your generous gift. This should result in me keeping my Manly Biker Status

loudhvx wrote: Never had any problem with mine.

Glad to hear the 650 is up and running.

Thanks Man, Hope to get out for a ride with you this summer. Love that GPZ of yours. And, thanmks for the great video footage! "Just a Blur!" Ha!

Despite what the Kawasaki.com parts diagram shows there is a spring in the original KZ650-B1 / C1 petcock. It is approx. 5/8 of an inch long and is rather stiff; its diameter is very slightly less than that of the depression in the plastic cone inside the petcock- it fits into that depression. Below is a photo of that petcock which shows the spring. Ed

Diagram of the KZ900 petcock (with which I'm more familiar) appears on kawasaki.com without showing the metal handle and plastic cone as two separate parts, and also omits showing the spring between them:



Am wondering if perhaps there's similar lack of detail on the KZ650 diagram.

Good Fortune!

Patton wrote: Diagram of the KZ900 petcock (with which I'm more familiar) appears on kawasaki.com without showing the metal handle and plastic cone as two separate parts, and also omits showing the spring between them:

Am wondering if perhaps there's similar lack of detail on the KZ650 diagram.

Good Fortune!

BINGO! You are absolutely correct! I edited my previous comment and included a photo of my spare petcock opened up. It's nice to be able to see the real deal rather than rely on a diagram; thanks or waking up my brain cells. Ed

650ed wrote:

Patton wrote: Diagram of the KZ900 petcock (with which I'm more familiar) appears on kawasaki.com without showing the metal handle and plastic cone as two separate parts, and also omits showing the spring between them:

Am wondering if perhaps there's similar lack of detail on the KZ650 diagram.

Good Fortune!

BINGO! You are absolutely correct! I edited my previous comment and included a photo of my spare petcock opened up. It's nice to be able to see the real deal rather than rely on a diagram; thanks or waking up my brain cells. Ed

Yes! I am vindicated! :woohoo: :woohoo:

Now as far as that spare petcock, DIBS!!! :whistle: