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Sportster Motorcycle Air intake, Carburetor, EFI, Fuel, and Exhaust Problems, advice and/or how tos for Sporster and Buell motorcycle carburators, Electronic Fuel Injection (EFI), Air Intake, Fuel and Exhaust.

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  #1  
Old 2nd April 2006
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Default Sound levels

I recently did the stage 1 mod's to my '05 1200R using the Hurricane AC and SE II Pro slip on mufflers. I really liked the sound and even the wife said it wasn't obnoxious but I was curious just how loud it was. I borrowed our sound meter from work and checked it out. I didn't check the bike before doing the stage 1 so I don't have anything to compare it to, but here's the numbers, all measured on the A scale:


Standing next to bike
At idle 83-84 dB's

2000 rpm, no load 92 dB's

For comparison:
2002 Dodge Cummins Diesel
At idle, standing next to front wheels 76 dB's

Jinma 22hp, 3 cylinder diesel tractor, standing next to front wheel
At idle 72 dB's

1500 rpm in operators seat 83-85 dB's
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  #2  
Old 2nd April 2006
cantolina's Avatar
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Default

Quote:
Originally Posted by joe66
I recently did the stage 1 mod's to my '05 1200R using the Hurricane AC and SE II Pro slip on mufflers. I really liked the sound and even the wife said it wasn't obnoxious but I was curious just how loud it was. I borrowed our sound meter from work and checked it out. I didn't check the bike before doing the stage 1 so I don't have anything to compare it to, but here's the numbers, all measured on the A scale:


Standing next to bike
At idle 83-84 dB's

2000 rpm, no load 92 dB's

For comparison:
2002 Dodge Cummins Diesel
At idle, standing next to front wheels 76 dB's

Jinma 22hp, 3 cylinder diesel tractor, standing next to front wheel
At idle 72 dB's

1500 rpm in operators seat 83-85 dB's
Cool...

What were your baseline levels?
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  #3  
Old 2nd April 2006
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Default

Quote:
Originally Posted by joe66
2000 rpm, no load 92 dB's
So... in other words, about 16 times the EPA's 80dBA limit!
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  #4  
Old 2nd April 2006
merc merc is offline
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that is cool.
I would be interested in how loud are the cycle shacks.
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Old 2nd April 2006
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Default

Quote:
Originally Posted by joe66
I recently did the stage 1 mod's to my '05 1200R using the Hurricane AC and SE II Pro slip on mufflers. I really liked the sound and even the wife said it wasn't obnoxious but I was curious just how loud it was. I borrowed our sound meter from work and checked it out. I didn't check the bike before doing the stage 1 so I don't have anything to compare it to, but here's the numbers, all measured on the A scale:


Standing next to bike
At idle 83-84 dB's

2000 rpm, no load 92 dB's

For comparison:
2002 Dodge Cummins Diesel
At idle, standing next to front wheels 76 dB's

Jinma 22hp, 3 cylinder diesel tractor, standing next to front wheel
At idle 72 dB's

1500 rpm in operators seat 83-85 dB's

Which if pulled over in Oregon would get you a ticket.
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  #6  
Old 2nd April 2006
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Default

The cycle shack slip-ons slash cut i had on my 2004 1200r
were 101-103 db at 2500rpms ,at idle they were 91-92 db.
at 6000 rpm they were 118 decibels of SWEET HARLEY THUNDER!!!!!!!!!!!!!
much louder than screaming eagle ll's.
i still have the pipes for sale in classified section.

Last edited by roderash; 2nd April 2006 at 15:42..
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  #7  
Old 2nd April 2006
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Default

Anybody know the sound levels on a Thunderheader? Just curious....
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  #8  
Old 2nd April 2006
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Default sound levels

Like I said, I never check the noise level before I changed the mufflers. I'm sure the stockers met the federal limits which I think is 80 dB's max.
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  #9  
Old 2nd April 2006
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Default

Quote:
Originally Posted by joe66
Like I said, I never check the noise level before I changed the mufflers. I'm sure the stockers met the federal limits which I think is 80 dB's max.
I meant the level before you started the bike...
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  #10  
Old 2nd April 2006
Moved On Moved On is offline
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Distance from the bike makes all of these measured levels a moot point. A measured sound level will fall off exponentially (power of 2) with distance (should be a 3dB drop every time you double the distance). I don't know what the distance is spec'd by the EPA, but here in NY the law gives dB ratings for a meter which has to be 50 feet away from the center line of the lane the bike is riding in.

http://public.leginfo.state.ny.us/me...MMONQUERY=LAWS
Search on "motorcycle sound" in the above link.

Gazza
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