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Left the petcock open overnight 25 May 2023 10:27 #885187

  • 1981KZ550
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I have an '81 KZ550A, and could not get the original vacuum petcock to stop leaking, so I replaced it with a manual petcock.  Its been running fairly well, but the other day, I rode and then accidentally left the petcock in the open position overnight.  I drained the float bowls, and fired it up. Seemed to run fine, but after a few minutes it sputtered and conked out.  I changed the oil and plugs, did not see any metal shavings or signs of fuel in the oil.  I can get it to idle fine, but when I down shift it sputters and dies. Help! Thanks,

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Left the petcock open overnight 25 May 2023 16:17 #885193

  • ckahleer
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Did the carbs overflow? Was there gas in the cylinders, airbox, or oil? Could it just be coincidence that the problem started after leaving the petcock on overnight?
I many times have forgoten to turn my petcock off without it causing an issue. 99% of the time the float needles keep the carbs from overflowing.
 
94 KE100
81 CM200t
82 KZ305
85 VT 500c
85 VF1100c

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Last edit: by ckahleer.

Left the petcock open overnight 20 Jun 2023 05:13 #886207

  • 1981KZ550
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Thanks. No carbs didn't overflow. I think now I realize its more of a fuel flow issue. When I added the fuel filter I had to extend the fuel line and it has to run "uphill" a bit from the petcock. I plan to shorten the fuel line and create a more direct "downhill" flow from the petcock to the carbs. We'll see....

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