major leak - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 11 (permalink) Old 04-10-2012, 06:08 PM Thread Starter
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Unhappy major leak

hey guys can anyone help i have a gush of oil, not a small leak coming from the front of the engine where the 1/2" breather tube connects to the engine lots of oil comes out when i run the engine Help what is causing this? please help what do i have to do to fix?

Last edited by rickyamy55; 04-10-2012 at 06:50 PM.
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post #2 of 11 (permalink) Old 04-10-2012, 06:54 PM
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Is the oil actually coming from the breather tube? There is a small weep hole not far below it that is linked to the deep set spark plugs. Then the o-rings go bad on them oil will leak out of that hole right below the breather tube.

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post #3 of 11 (permalink) Old 04-10-2012, 06:56 PM
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Bookmarked just because this is good information to have around.

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350
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post #4 of 11 (permalink) Old 04-10-2012, 07:49 PM Thread Starter
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ok i just checked the bike the weep hole seems to be plugged up it is not open no oil comes out there and the oil is coming out of breather tube outlet
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post #5 of 11 (permalink) Old 04-10-2012, 08:17 PM
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Is your oil at propper level?

02 honda sabre 1100
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post #6 of 11 (permalink) Old 04-10-2012, 08:25 PM Thread Starter
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that might be in question because i have a small leak in the carbs if i do not shut off fuel valve it will loeak slowly into engine probably having excess in the crank case i just went to pepboys to drain oil and change with new oil and correct level do not know if that will take care of it
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post #7 of 11 (permalink) Old 04-10-2012, 08:40 PM
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Does the oil smell gassy? What year is the bike? Does your petcock leak if you switch it to off? Might be a thought till you get the carb issue fixed.
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post #8 of 11 (permalink) Old 04-10-2012, 08:50 PM Thread Starter
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it is a 2005 model the petcock does not leak it is just the floats i just forgot to shut off and yes the oil that spilled on the floor smells very strong in gasoline
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post #9 of 11 (permalink) Old 04-11-2012, 09:22 AM
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Our sons project bike started leaking a lot after simply tightening the spark plug tubes?
I replaced the o-rings on them and it stopped.
They must have been dried out. It was hard to tell at first where it was coming from.
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post #10 of 11 (permalink) Old 04-11-2012, 02:55 PM Thread Starter
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thanks i will keep an eye on that God Bless
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