Smoke from rear exhaust - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 6 (permalink) Old 06-23-2019, 05:32 PM Thread Starter
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Smoke from rear exhaust

I guess this fits in engine exhaust because I don’t think it’s electrical. I’ve seen other threads where people had this issue and the thread does without an answer. The space between the rear exhaust outlet and the frame I have smoke coming out (little). This is new since I took the motor out to change the stator. Nothing appears to be touching, the bike doesn’t sound like the exhaust is loose (used new metal o ring thing) and is torques to spec. Nothing is touching that I can see. I thought maybe it was from spraying wd40 or kroil to get things moving but it still does it after a while of running. I see no visible oil drip from head cover and feel no residue where I can reach.
The hard plastic like spacer in the engine block is the only thing I can think of but it’s back together as it came out so can’t think of why this would happen. Any suggestions?
I was considering pulling out the motor mount and seeing if it still does it.
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post #2 of 6 (permalink) Old 06-25-2019, 12:31 PM Thread Starter
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The hard plastic spacers I’m seeing that fit exactly don’t show on the parts diagram could this be the issue?
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post #3 of 6 (permalink) Old 06-25-2019, 12:40 PM
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Not sure unless it's just lube burning off.

I think the spacers on mine were metal.

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post #4 of 6 (permalink) Old 06-27-2019, 02:38 PM Thread Starter
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These feel like black plastic very light for metal. I think my best bet is to pull that motor support let it run a few minutes idling and see if without the bolt or the spacers it does it.
Sound reasonable?
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post #5 of 6 (permalink) Old 06-27-2019, 03:09 PM
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Worth a try, see if the plastic looks melted. Did it smell like hot plastic?

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__________________________________________________ ____________
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post #6 of 6 (permalink) Old 07-23-2019, 07:52 PM
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Mine also boils smoke from exhaust when motor is hot, the problem with mine is on the rear motor mount it has a plastic orange spacer. And it’s actually bubbling and melting. I scrape my knife across it to verify it was plastic. Shouldn’t they be metal? Kinda strange they would use plastic knowing it’s going to be touching the rear manifold

Edit-added picture of orange piece causing all the smoke
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Last edited by loneWolf; 07-23-2019 at 08:06 PM.
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