 Engine Noise
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Joined: Jun 2006
Posts: 1,382
Learned Hand
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OP
Learned Hand
Joined: Jun 2006
Posts: 1,382 |
Didn't someone post a site that had different noises our motors made when stuff was wrong? Just when I think I've got everything fixed, I've got a noticable noise (I don't think its valves... its not a "clack"). This is more like a loud whistling noise when you put it under gradual throttle... almost sounds like a turbo (I wish!) spooling up. Other than the noise the bike runs great...? Could it be the speedo cable??
'06 TBA - Black, AI and Snorkel removed, K&N Drop In, Gutted Stock Pipes, 145/42, 2 turns out.
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Re: Engine Noise
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Joined: Apr 2007
Posts: 3,063 Likes: 8
Loquacious
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Loquacious
Joined: Apr 2007
Posts: 3,063 Likes: 8 |
Does the noise intensity increase with engine speed or road speed? Speedo drive noise will follow the speed of your bike.
12 Rocket Roadster
03 Bonneville America
69 BSA Firebird Scrambler
73 Yamaha TX 750
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Re: Engine Noise
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Joined: Feb 2007
Posts: 23,243 Likes: 64
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,243 Likes: 64 |
That sounds like the normal noise our engines make. I think the consensus was that it is the primary gears but I wondered if it might be from the timing chain.It used to bother me but now I don't even hear it.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: Engine Noise
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Joined: Dec 2006
Posts: 7,028 Likes: 8
New Tires
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New Tires
Joined: Dec 2006
Posts: 7,028 Likes: 8 |
Get a set of non baffled Septre exhaust, you won't hear that noise anymore. 
Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats.
H. L. Mencken
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Re: Engine Noise
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Joined: Jun 2006
Posts: 1,382
Learned Hand
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OP
Learned Hand
Joined: Jun 2006
Posts: 1,382 |
Well I've got totally gutted stock pipes (which are very loud) and I can distinctly hear the noise over the pipes. I hung down off the side of the bike while riding (quite a feat in itself) and the sound is definately coming from the motor. I'm kinda with Ian here... the bike runs great for a change... I'm going to convince myself not to worry about it. I'll have it checked out when I do my big bore!
'06 TBA - Black, AI and Snorkel removed, K&N Drop In, Gutted Stock Pipes, 145/42, 2 turns out.
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Re: Engine Noise
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Joined: Jan 2005
Posts: 2,531
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 2,531 |
Quote:
Get a set of non baffled Septre exhaust, you won't hear that noise anymore.
Solved my questionable noise problem fer sure !!! 
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Re: Engine Noise
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Joined: Jan 2005
Posts: 5,172
Saddle Sore
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Saddle Sore
Joined: Jan 2005
Posts: 5,172 |
Could be a leak - intake or exhaust.
More flags
More fun!
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Re: Engine Noise
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Joined: Jan 2008
Posts: 1,174 Likes: 15
Learned Hand
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Learned Hand
Joined: Jan 2008
Posts: 1,174 Likes: 15 |
I get that sort of 'turbo-ish' spool up noise but it is coming from the cam gears. use to worry something was wrong, but found no wear or metal fines. probably the sound caused by the straight cut gear teeth and the back lash compensators.
05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter
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Re: Engine Noise
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Joined: Dec 2006
Posts: 7,028 Likes: 8
New Tires
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New Tires
Joined: Dec 2006
Posts: 7,028 Likes: 8 |
Are you shure it's not wind whistling though your teeth as you grin happily now that you baby is up and running well? Seriuosly, every Bonnie varient, 360 and 270 degree, I've ridin has a distinct noise coming from the head. It's especially noticable on a completely stock bike. Some refer to it as the sewing machine noise.
Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats.
H. L. Mencken
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Re: Engine Noise
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Joined: Sep 2009
Posts: 950
Banned
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Banned
Joined: Sep 2009
Posts: 950 |
Quote:
Does the noise intensity increase with engine speed or road speed? Speedo drive noise will follow the speed of your bike.
Sorry to hijack,what sound does the speedo drive make?
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Re: Engine Noise
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Joined: Apr 2008
Posts: 3,937
Loquacious
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Loquacious
Joined: Apr 2008
Posts: 3,937 |
"wack-a-wack-a-zing-ding-ping"
And you may see me tonight
With an illegal smile
J. Prine
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Re: Engine Noise
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Joined: Sep 2009
Posts: 950
Banned
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Banned
Joined: Sep 2009
Posts: 950 |
Quote:
"wack-a-wack-a-zing-ding-ping" [/Wquote]Wow,so glad you could stop by with your insight.I thought that was the sound coming from under your sisters bed. 
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Re: Engine Noise
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Joined: Apr 2008
Posts: 3,937
Loquacious
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Loquacious
Joined: Apr 2008
Posts: 3,937 |
There ya go! Now ya know. 
And you may see me tonight
With an illegal smile
J. Prine
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Re: Engine Noise
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Joined: Feb 2006
Posts: 1,690
Learned Hand
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Learned Hand
Joined: Feb 2006
Posts: 1,690 |
I have two 2005 Americas, and they both make that noise...
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Re: Engine Noise
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Joined: Apr 2007
Posts: 3,063 Likes: 8
Loquacious
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Loquacious
Joined: Apr 2007
Posts: 3,063 Likes: 8 |
Quote:
Quote:
Does the noise intensity increase with engine speed or road speed? Speedo drive noise will follow the speed of your bike.
Sorry to hijack,what sound does the speedo drive make?
Sorry for the late reply. Missed this one.
Some of the fellows have reported different noises from the speedo. Here is a link to a member who had a grinding noise from his due to an improperly seated cable. http://www.bonnevilleamerica.com/forums/...true#Post414797
I imagine you could also get a high frequency whirring noise or some form of cable noise from a binding cable in the housing. These are low tech mechanical devices and with them come a miriad of noise type potentials.
12 Rocket Roadster
03 Bonneville America
69 BSA Firebird Scrambler
73 Yamaha TX 750
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