Top end noise (I think) - Harley Davidson Forums: Harley Davidson Motorcycle Forum
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post #1 of 18 (permalink) Old 11-08-2012, 07:41 PM Thread Starter
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Top end noise (I think)

So it finally got cold here, and I've heard a new noise that I suspect is piston slap but thought I'd get some opinions.

I only hear a slight rattling (similar to the noise loose sheet metal makes in the wind) for the first few minutes until the engine warms up, and only under load from about 2000 rpm to 2500 rpm. At idle and in neutral I don't hear a thing, so I haven't been able to pinpoint it.

The motor has around 100k on it, and has never been apart. Did put new cams in (255) about 10,000 miles ago, and adjustable push rods, but original lifters, tappets, etc. Had the primary apart two weeks ago to inspect and no issues found. No leaks or unusual oil consumption. Any thoughts?

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post #2 of 18 (permalink) Old 11-08-2012, 10:24 PM
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Run her till she blows....

Or wait till someone responds who can help ya


Hope ya get it sorted out

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post #3 of 18 (permalink) Old 11-09-2012, 05:48 AM Thread Starter
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Run her till she blows....

Or wait till someone responds who can help ya


Hope ya get it sorted out
Yeah, and stay out of cold weather....was thinking of doing a 103 kit next fall anyway.

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post #4 of 18 (permalink) Old 11-09-2012, 07:47 AM
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Sounds like a lifter that is beginning to bleed down, when sitting.
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post #5 of 18 (permalink) Old 11-09-2012, 07:58 AM
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100k and never been apart .... I'd say you might be due for a top end over haul !!!

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post #6 of 18 (permalink) Old 11-09-2012, 08:10 AM
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I just want to know your maint schedule... 100K never apart... good for you!!

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post #7 of 18 (permalink) Old 11-09-2012, 09:39 AM Thread Starter
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I just want to know your maint schedule... 100K never apart... good for you!!
I ride the sh!t out of it. I've always believed that lack of exercise is the main reason mechanical issues arise. I put 3 to 5k miles on per month and do the normal intervals for plugs/fluids/lubrication/inspection.

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post #8 of 18 (permalink) Old 11-09-2012, 09:41 AM Thread Starter
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100k and never been apart .... I'd say you might be due for a top end over haul !!!
Yeah, that's what I'm thinking. New tappets, check valves, sounds like maybe new lifters too. Hence the thought of bumping up to the 103.

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post #9 of 18 (permalink) Old 11-09-2012, 09:42 AM Thread Starter
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Sounds like a lifter that is beginning to bleed down, when sitting.
Scott
The OEM has been pretty good to me, but do you have a preferred replacement?

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post #10 of 18 (permalink) Old 11-09-2012, 10:09 AM
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Originally Posted by nipplesurfer View Post
The OEM has been pretty good to me, but do you have a preferred replacement?

It may be that the only purpose for your life is to serve as a warning to others.
Nipplesurfer, I have the very same issue, developed about two months ago. Sounds like a valve clatter starting around 2,000 RPM and seems to be pronounced under load.

If you can hang on for a week or so, I am putting mine in the shop for the heads to get re-worked to SE specs, and replace the lifters (I also have just over 100K, and the tech suspects it is a lifter going south). I didnt look to see what kind of engine you have, mine is a twin 88" with the 95" kit on it. He says the job will take around a week, when I pick it up, I'll let you know if that made the noise go away.


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