gas/exhaust - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 11 (permalink) Old 06-26-2006, 03:21 PM Thread Starter
 
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gas/exhaust

what causes gas to leak out exhaust??? Or , what is the fix for gas leaking out exhaust pipe.?
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post #2 of 11 (permalink) Old 06-26-2006, 05:26 PM
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Wow, you are probably going to have to elaborate on this for any of us to understand the problem. You have gas leaking out the exhaust pipe? Just sitting there, or running or what? Are you positive it is gasoline? If it's doing this just sitting there not running, your oil is probably full of gas and you don't want to start up the bike until you have changed oil and fixed this!

Give more information if you can.

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post #3 of 11 (permalink) Old 06-26-2006, 07:01 PM Thread Starter
 
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gas / exhaust

OK, I just bought the bike . It had 3200 mi and is a 1996 vn750.I had a gas leak at the petcock diaphram and fixed it. It has been very hard to start or would not start. I finally got it started and rode to fill up and had to push it home (just died).So this morning would not start and finally backfired (scary),some smoke. So I said "enough" loaded bike on trailer and gas flowed out of tail pipe. I don't as of yet have a manual of any sort and know nothing about this model bike. So I hauled into repair shop. What is your diagnoses???What is this going to cost to fix..Bound to be some carb prob eh? Let me know what you think. Thanx

Last edited by bilyum; 06-26-2006 at 07:03 PM. Reason: spelling
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post #4 of 11 (permalink) Old 06-27-2006, 05:27 AM
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Sounds like you were getting some major flooding.
You don't hold the throttle open while trying to start it, do you ??

Possibly carb problems, but like Fergy said, check to be sure there's no gas in the oil too.


Good luck with the fix !!


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post #5 of 11 (permalink) Old 06-27-2006, 09:59 AM
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Question

Quote:
Originally Posted by bilyum
what causes gas to leak out exhaust??? Or , what is the fix for gas leaking out exhaust pipe.?
I had the same exact problem with my '97... I pulled all the vent lines from tank and blew them out along with the small vent at cap. Pulled and cleaned the carbs and petcock. And definitely change the oil because it does have gas in it. I filled it up and rode 150 miles yesterday with no problems, stopping and restarting several times just to be sure. I turn my petcock to off every time I let it sit at all now. Before I left it on all the time. I never did find a definite problem but the bike is running now.

Out of VN750s...
On to bigger and better things!
1997 Black & Silver ***SOLD***
Insurance Replaced: 08/25/2008
Mileage: 10/29/08- 4644 miles


Son's **Sold: In the ARMY & married $$$**
1995 Teal Green
Purch 08/17/2007: 14,240 miles
10/29/2008: 17,640 miles

Wife's **Sold: shoulder injury**
1999 Gray/Black w/Fairing
Purch 06/22/08: 18,160 miles
10/29/2008: 19,889 miles
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post #6 of 11 (permalink) Old 06-27-2006, 12:06 PM
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Did the bike smoke when you rode it? If so, black or white?
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post #7 of 11 (permalink) Old 06-27-2006, 01:47 PM
 
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Yeah sounds like flooding, had it happen with my 440, spewed gas out of a cylinder into the exhaust pipe, big puff of flame, rousing laugh, and rebuilt carbs a total of 12 times now. So i got the 750. =)
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post #8 of 11 (permalink) Old 06-27-2006, 03:27 PM
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Red face

Quote:
Originally Posted by artman
Did the bike smoke when you rode it? If so, black or white?
The overflow of gas diluted the oil and flooded rear cylinder with oil and smoke was white until plug fouled. Cleaned up and excess gas burned black smoke until flooded and flaming backfire. Cleaned carbs and all vent hoses and lines from tank and bike is back running.

Out of VN750s...
On to bigger and better things!
1997 Black & Silver ***SOLD***
Insurance Replaced: 08/25/2008
Mileage: 10/29/08- 4644 miles


Son's **Sold: In the ARMY & married $$$**
1995 Teal Green
Purch 08/17/2007: 14,240 miles
10/29/2008: 17,640 miles

Wife's **Sold: shoulder injury**
1999 Gray/Black w/Fairing
Purch 06/22/08: 18,160 miles
10/29/2008: 19,889 miles
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post #9 of 11 (permalink) Old 06-29-2006, 11:27 AM
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I would have loved to have seen that puff of flame.
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post #10 of 11 (permalink) Old 06-30-2006, 06:37 PM
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Years ago when my CJ7 shorted and caught fire and burned up in my driveway one night, and when the volunteer fire cheif, who lived across the street and was on vacation at the time, but the firetruck which was still parked in his yard wouldn't start, and while the volunteer crew and I waited for another firetruck to arrive, while we watched my cherry red Jeep/bonfire as we could hear the siren in the distance... the old firetruck finally came rolling round the corner, sputtering like it was about out of gas, and then it backfired, and a four foot ball of flame shot out and rolled down the street behind it...

At the time, it wasn't very funny but now it kinda is.

Fergy
Kyle, TX VN750.com member #707 VROC#19556
2002 VN1500 Classic
Spline Lube Procedure, with photos, R/R Relocation and Coil Mod
Rusty Tank Cleaning!
Electrical Fault Finding Flowchart
SEAFOAM JUNKIE!


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