what am i hearing??
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Road Warrior
Joined: Oct 2009
Posts: 1,664
Likes: 99
From: P.E.I. Canada
what am i hearing??
I set my timing ahead until i got my ping back. Sounds like a quarter hit on glass, rock hitting fender, hammer on metal.... something loud and distinct. Backed timing off, and at around the same rpm level I'm getting a rapid noise that still kinda sounds like tiny little pebbles hitting the fender. It's a very rapid noise, and only happens at certain rpms/throttle positions. Is this still pre-ignition of some sort or is it just normal engine noise. Like I said, It's not a loud, distinct ping.
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Road Warrior
Joined: Oct 2009
Posts: 1,664
Likes: 99
From: P.E.I. Canada
GRRRRRR!!! I'm about to loose it. I thought I finally had this problem fixed. I'm not even sure what to try anymore. I've set my timing back 'till the bike ran like ****, i've added octane boost, I did a cam swap and dropped my ccp by 20psi, I tried seafoam to clean out the carbon, plus ran cleaner with the fuel, i've run a rich afr, my plugs look perfect, what else do i do?
On the plus side, the bike pulls strong, great power, no dead spots, so maybe I just ride it until the piston breaks.
On the plus side, the bike pulls strong, great power, no dead spots, so maybe I just ride it until the piston breaks.
Road Master
Joined: Feb 2010
Posts: 1,237
Likes: 61
From: Albany, OR
Probably a rattle. I have the same thing at about 2500 and 2780 RPM. It isn't knock, it happens under a no-load condition. Besides, the ECM will adjust the spark tables if it sees knock enough in one area of the map. I've seen it pull several degrees on its own where I had a real lean condition in a few cells. I think I've checked every nut a bolt on the bike and can't come up with anything. I swear it is an exhaust heat shield rattle/buzz. I may have to loosen them all up, adjust and tighten again. I just stay off those two particular RPMs for now.
Elite HDF Member
Joined: Jun 2008
Posts: 4,109
Likes: 9
From: Connecticut
Have you had anyone else ride it to hear the noise? Just a thought is to have someone ride it and see if they hear it. Sometimes we pick up on somethings that are there and key in on them so much they sound a lot worse than they are.....one more thought have you removed the tuner and just run it on the stock ECM and see how it goes? does the noise go away?
Last edited by Blk and Chrome; Jun 3, 2012 at 06:56 AM.
Thread Starter
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Road Warrior
Joined: Oct 2009
Posts: 1,664
Likes: 99
From: P.E.I. Canada
Have you had anyone else ride it to hear the noise? Just a thought is to have someone ride it and see if they hear it. Sometimes we pick up on somethings that are there and key in on them so much they sound a lot worse than they are.....one more thought have you removed the tuner and just run it on the stock ECM and see how it goes? does the noise go away?
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Road Warrior
Joined: Oct 2009
Posts: 1,664
Likes: 99
From: P.E.I. Canada
You know what? I'm going out for a ride today, and since timing doesn't seem to change anything at all, I'm putting it back up to normal instead of retarding it everywhere, I'm gonna put on my tunes, and I'm gonna forget about it. It's not putting metal flakes on the plugs so I'm pretty sure it's not blowing holes in my pistons. If the bike blows up, I'll rebuild it. Maybe even go a little bigger 
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Extreme HDF Member
Joined: Dec 2010
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From: Badlands of ND
Probably a rattle. I have the same thing at about 2500 and 2780 RPM. It isn't knock, it happens under a no-load condition. Besides, the ECM will adjust the spark tables if it sees knock enough in one area of the map. I've seen it pull several degrees on its own where I had a real lean condition in a few cells. I think I've checked every nut a bolt on the bike and can't come up with anything. I swear it is an exhaust heat shield rattle/buzz. I may have to loosen them all up, adjust and tighten again. I just stay off those two particular RPMs for now.
Club Member
Joined: May 2007
Posts: 145,895
Likes: 821
From: 40 miles Northeast of Indy..
At times I get what I call a Bongo drum sound from the motor, just a steady real fast beat, used to hear it when I first got the bike.
Like above said, sometimes when we listen for a noise we hear it a lot more.
I quite listening for it and now I don't hear it any more..
Thinking,,,When we get focused in on something, we can make it worse than it really is sometimes.
Add.... I just remembered that some tourning bikes back in 07 had what they called rocks rattleing in a can noise at lower rpm and under load.. but it was usually a loose compensator.. lot of members put in the SE comp to help also..
But Ur new 12 bike comes with the SE comp.. but it might still be loose...
.
Like above said, sometimes when we listen for a noise we hear it a lot more.
I quite listening for it and now I don't hear it any more..
Thinking,,,When we get focused in on something, we can make it worse than it really is sometimes.
Add.... I just remembered that some tourning bikes back in 07 had what they called rocks rattleing in a can noise at lower rpm and under load.. but it was usually a loose compensator.. lot of members put in the SE comp to help also..
But Ur new 12 bike comes with the SE comp.. but it might still be loose...
.
Last edited by oct1949; Jun 3, 2012 at 12:00 PM.