upper front cylinder noise vulcan 900 - Kawasaki Vulcan Forum : Vulcan Forums
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post #1 of 13 (permalink) Old 07-31-2019, 07:23 PM Thread Starter
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upper front cylinder noise vulcan 900

I did a youtube of the noise. (video in the next post)

Don't lost power, the shims valve are OK, change spark plugs, filter and oil, try "seafoam"...

When I used stetoscope, the noise came clrearly from de upper front cylinder, on the right side (oposite to the chain and sproket if I remember)

I suspect cam shaft, rocker, rocker arm, lifter and worst, could be comming from lower parts as pistons.
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post #2 of 13 (permalink) Old 07-31-2019, 07:24 PM Thread Starter
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post #3 of 13 (permalink) Old 08-01-2019, 07:04 AM
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Sounds like a collapsed lifter, or bent valve. Is it full of oil?
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post #4 of 13 (permalink) Old 08-01-2019, 11:30 AM
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Quote:
Originally Posted by Vulcan guy View Post
Sounds like a collapsed lifter, or bent valve. Is it full of oil?
The 900 doesn't use lifters. The rocker arm contacts the shim which contacts the head of the valve stem. That's one of the reasons these engines are so noisy. There's no cushioning of the valve stroke.
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post #5 of 13 (permalink) Old 08-01-2019, 12:11 PM
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Cool Internet Mechanic says:

Internet mechanic says sounds like piston slap. Time to tear off the heads and have a lookski?

How many miles on this faulty 900? Need to ship it to me ASAP your cost I will get rid of it for you!!!


Could be a noisy fuel injector

Shinko 230 Tour Master Tires Rear tire 180/70-15 Front tire 130/90-16
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post #6 of 13 (permalink) Old 08-01-2019, 12:51 PM Thread Starter
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Quote:
Originally Posted by Vulcan guy View Post
Sounds like a collapsed lifter, or bent valve. Is it full of oil?

Full of oil, yes, and 67000 KM so around 40 000 miles

I will open it in the month. I will have to learn to inspect rocker and more. I just did clearance valves and shims were ok.

Thank you guys, will give more infos and videos when open
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post #7 of 13 (permalink) Old 08-01-2019, 01:39 PM
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When did the bike start to make the "noise" you are concerned about? Can't access the vid at this time.

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post #8 of 13 (permalink) Old 08-01-2019, 08:05 PM
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Does not sound like piston slap to me.
Sounds like valve train noise of some sort.
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post #9 of 13 (permalink) Old 08-02-2019, 05:03 AM
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I agree with sfair about valve train noise. When you checked the valve clearances, how did the cam lobes look? I'm fairly sure you would have noticed if the lobes looked scored. Since the rocker arms slide on this motor (to adjust the shims), are they all fully back in place? Are the cams loose in their bearing saddles? The cam chains sound good to my ear. The noise seems to occur when a cam lobe pushes down on a valve stem, so something is not right there.
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post #10 of 13 (permalink) Old 08-15-2019, 04:44 PM Thread Starter
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I finally got time to inspect. There is wear on exaust rocker arms and camshaft valve, (2 minutes video) .

I opened the front cylinder for inspection. Seem that it is really worn. Do the noise come only from that ? I hope. But could be coming from throttle assembly ??? I don't know

I bought front cylinder cameshaft valve and intake and exhaust rocker arms

Thanks to every body trying to help me, really appreciated


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