Exhaust nightmares - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 104 (permalink) Old 06-19-2017, 01:28 PM Thread Starter
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Exhaust nightmares

Ok, so here is the update to Oil Woes. I got everything taken care of and have been riding the bike everyday since. Now out of the blue... I am blowing smoke on every start up. It smells horrible like running rich or oil burning in the cylinders. I pulled the plugs to check for fowling and there isn't **** on them just white tips which would indicate being lean.. but my exhaust is covered in black soot like it's running rich... it wouldn't start today leaving work and it's the only moving rig I have. Please help me out. Been reading other forums but it just isn't making sense.... Could be engine flooding but I have no idea. I don't know what this smell is. When I can I will pull the oil and check for debre and hopefully the oil won't smell like gas. Pretty sure I need to rebuild the carbs

Don't worry!!, It's just a bump in the road.
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post #2 of 104 (permalink) Old 06-19-2017, 01:37 PM
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that's no good! may be a stuck float or the carbs like you're saying. I'm not too sure, never had an issue like this but hopefully somebody with some more experience will chime in

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post #3 of 104 (permalink) Old 06-19-2017, 01:45 PM Thread Starter
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That's what I am hoping, I really don't want to tear into the block to fix this.

Don't worry!!, It's just a bump in the road.
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post #4 of 104 (permalink) Old 06-19-2017, 04:51 PM
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is it a gas smell(flooding)or a sickly sweet smell?is there any oil in your coolant? what color is the smoke? is it possible you overfilled the oil?just a few questions to get an idea what might be going on.

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post #5 of 104 (permalink) Old 06-20-2017, 11:09 AM Thread Starter
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Ok so, the smoke looked White to me. I'm bad at judging the color of smoke. I read on some of the other threads that you can get smoke from overfilling so I drained my oil to the point that it's sitting just barely below high marker. It smoked last night going to work still but this morning it barely did at all. Might have been the fix. Thanks doc! Would not have thought of the oil till you said something

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post #6 of 104 (permalink) Old 06-20-2017, 12:13 PM
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well it was a thought because it didn't smoke before the oil change.if it was above the high Mark before that was most likely your problem

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post #7 of 104 (permalink) Old 06-20-2017, 12:16 PM Thread Starter
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I'll ride for a few days and see if it stops completely. I had oil in the air filters

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post #8 of 104 (permalink) Old 06-20-2017, 01:12 PM
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Smoke can be hard to judge color if it's thick. Oil, normally a pale blue can look white, oil will hang in the air longer. Raw fuel in a hot pipe is white and dissipates quickest, partially burned rich mixture is black. Steam is white, will dissipate quick on hotter, dry days, hangs longer on cool, wet days. Steam will fog a piece of glass.

One thing you can do, check the petcock vacuum line after a run and make sure it's dry. Gas can leak through the line, flood the front cylinder, and fill the crankcase. The leakage will occur when the engine is not running, allowing the fuel to accumulate. If it's leaking the petcock needs a diaphragm.

Be wary of white fuel vapor in a cloud, it will ignite real easy.

The stock pipes mix the exhaust from side to side, so seeing smoke in one muffler isn't a good indicator of which cylinder has the problem.

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post #9 of 104 (permalink) Old 06-20-2017, 04:27 PM
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definitely a good catch on the oil. I overfilled mine once by JUST A BIT and the crank frothed the oil so bad I had to burp it every time I started it to get proper oil pressure. Drained a bit, refilled it ever so slowly and patiently while checking the site glass every 5 minutes, no more frothing issues

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post #10 of 104 (permalink) Old 06-20-2017, 07:42 PM
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I am still new to the Vulcan 750. I bought one not running a few weeks go. Once I finally got it running, it blew white smoke really bad. I almost cried as I though I got burned on the deal. Anyway, it turns out that I filled the oil to the hight mark. I trained the oil to the middle of the low and high mark and the smoke went away. So sounds like you just over filled it with oil. Hopefully you draining some fixed your problem.

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