help with noise?
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Intermediate
Joined: Feb 2010
Posts: 43
Likes: 0
From: new england
help with noise?
new to HD, my FLSTFB (3000 mi) makes a strange noise if I accelerate in too high of a gear...yes, I know...dont do it. OK fine. But Im curious about the noise anyway, Id like to understand the bike better. Lets say I have to stop quick with no time to downshift and immediately re-accelerate ( I said ok...I wont do it anymore) I hear a strange metallic noise that sounds a little like a metal cable being cut under tension...what is this? Any one understand what Im talking about?
Club Member
Joined: Jul 2007
Posts: 463
Likes: 1
From: in a trailer next to a ditch in South Florida
Sounds like you are experiencing what is commonly known as "pinging". This is the sound of pre-ignition/detonation. If carried to extremes it can seriously damage the valve train and if under heavy load and continued throttle, can burn a hole in pistons! It is a condition casued by self-ignition of the "end-gases" of the fuel/air-mix in the combustion chambers. Obviously, it can be extremely damaging if you fail to back off the throttle and downshift.
Make certain that you only use hi-test 91-93 octane fuel and USE YOUR SHIFT LEVER!
Make certain that you only use hi-test 91-93 octane fuel and USE YOUR SHIFT LEVER!
Ultimate HDF Member
Joined: Feb 2008
Posts: 5,615
Likes: 9
From: Escondido, CA
Donny Peterson once said the worst thing you can do to the Harley tranny is accelerate in too high of a gear. It puts extreme pressure on it and will kill it faster than anything else. Try learning how to downshift before cracking the throttle.
Ultimate HDF Member
Joined: Oct 2007
Posts: 5,257
Likes: 6
From: Leander Texas
yes ping and mine did that for years until i got a new fuel filter. my bike also sat for a year before it was sold. when i changed the filter you could not blow air threw it. it now runs smoother and faster than when it was new
Cruiser
Joined: May 2010
Posts: 231
Likes: 1
From: Milton Keynes, UK
new to HD, my FLSTFB (3000 mi) makes a strange noise if I accelerate in too high of a gear...yes, I know...dont do it. OK fine. But Im curious about the noise anyway, Id like to understand the bike better. Lets say I have to stop quick with no time to downshift and immediately re-accelerate ( I said ok...I wont do it anymore) I hear a strange metallic noise that sounds a little like a metal cable being cut under tension...what is this? Any one understand what Im talking about?
Thread Starter
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Intermediate
Joined: Feb 2010
Posts: 43
Likes: 0
From: new england
I like destruction n' all but not on my dime. Its only happened twice, but I suppose thats enough...strange noise tho, very science fiction-warpy sound. Not engine pinging.
Must-be-more-careful
thanks
Must-be-more-careful
thanks
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