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Float Needle or Drain Screw (Gas Leak)
- Requiescat
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1980 KZ750H LTD
I have gas leaking out of the drain of my #1 carburetor, I was adjusting the float level today, the tank was about 2 feet above the carburetor, The fuel level stabilized where it was supposed to. I put everything back together, But now there is gas leaking out the drain at the bottom.If the float needle was bad, wouldn't the gas keep rising above the spot where it was supposed to level out?
This leads me to belive the drain screw and o ring are bad. The clown that had the bike before has made a mess of the drain screws, it looks like he used a butter knife to tighten them. Is it possible that I just need to replace the drain screws and o-rings? I've had the carbs off three times in the last week, If I can fix this leak with a screw, I'll be pretty happy.
1980 KZ750H LTD more fun than a barrel of monkeys.
have had:
1982 Suzuki GS400L (wadded by an ex friend).
1982 CB 750 Nighthawk(sold to a friend).
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- Hounddog09er
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- KZ 1100 spectre
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Braden
1998 kx80
1982 Kz1100 D1 Spectre
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- Requiescat
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Thanks Man
Requiescat
1980 KZ750H LTD more fun than a barrel of monkeys.
have had:
1982 Suzuki GS400L (wadded by an ex friend).
1982 CB 750 Nighthawk(sold to a friend).
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- Patton
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Here's a bizarre question,
1980 KZ750H LTD
I have gas leaking out of the drain of my #1 carburetor, I was adjusting the float level today, the tank was about 2 feet above the carburetor, The fuel level stabilized where it was supposed to. I put everything back together, But now there is gas leaking out the drain at the bottom.If the float needle was bad, wouldn't the gas keep rising above the spot where it was supposed to level out?
This leads me to belive the drain screw and o ring are bad. The clown that had the bike before has made a mess of the drain screws, it looks like he used a butter knife to tighten them. Is it possible that I just need to replace the drain screws and o-rings? I've had the carbs off three times in the last week, If I can fix this leak with a screw, I'll be pretty happy.
The fuel level stabilized where it was supposed to.
This could happen where leakage from drain screw location was less than fuel being allowed into floatbowl via the float valve.
This would likely not happen with leaking float valve allowing excessive fuel into floatbowl, because fuel would continue rising to overflow level.
But now there is gas leaking out the drain at the bottom.
Is the gas leaking only from the drain screw or also from the overflow nipple??
If the float needle was bad, wouldn't the gas keep rising above the spot where it was supposed to level out?
Yes, up to the overflow level.
This leads me to believe the drain screw and o ring are bad. The clown that had the bike before has made a mess of the drain screws, it looks like he used a butter knife to tighten them. Is it possible that I just need to replace the drain screws and o-rings?
Messed up drain screw and bad o-ring (leaking from drain screw area) won't cause floatbowl overflow.
If threads on the drain screw itself are stripped (male threads) and female threads in floatbowl remain sound, could replace drain screw and o-ring.
Where female threads in floatbowl are stripped, might try using fuelproof Permatex in threaded area to avoid the leakage until acquiring a replacement floatbowl.
Sometimes the overflow tube inside floatbowl gets cracked, whereby fuel drips out overflow nipples regardless of level inside floatbowl.
Good Luck!
1973 Z1
KZ900 LTD
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- bountyhunter
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1979 KZ-750 Twin
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- 650ed
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The carb overflow hoses are normally routed down behind the engine to discharge on the ground (at least that how KZ650's are done). If overflows leak the float valve is probably dirty unless the floats are really riding high or something is cracked. Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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