Just Curious - Can Harleys Be Made to Run Quiet ? - Page 4

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Posted by Vito on October 28, 2008, 11:00 am
 
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Got that right!  Look at all the stink bug styled stunt bikes sold as
performance bikes.



Posted by Bob Myers on October 28, 2008, 1:38 pm
 

Works equally well that way, I gotta admit....

Bob M.




Posted by tomorrow@erols.com on October 28, 2008, 1:04 pm
 
Actually, Harley has been advertising responsible motorcycle noise
levels for at least the last five years, and four years ago, iirc they
removed all of their accessory pipes except the ones that are
genuinely used at drag racing strips by drag racers (clearly marked
for off road use only, etc) from their catalog, and only offer legal
noise level accessory pipes, now.  They ceded the entire illegally
loud street accessory pipe market to the aftermarket, and they
continually urge rider responsibility and restraint as far as
motorcycle noise emissions are concerned.

They do, of course, tune their bikes and reduce their overall noise
output (induction noise, fin ringing, gear whine, chain/belt noise,
etc) to allow as much as possible of the unique firing cadence of the
Harley 45-degree v-twin to come through within the 81DbA (I think)
federal noise level allows.   That's what Ducati and Triumph do wrt
their exhaust systems, too.   That would be considered intelligent
marketing, in Harley's case especially, since they have built
motorcycles with that characteristic for about 100 years or so, and it
is considered to be a pleasant sound by most owners.   The fact that I
hate it only makes it easier for me to run oem pipes on my Street
Glide.

Posted by MikeWhy on October 28, 2008, 3:36 pm
 
Actually, Harley has been advertising responsible motorcycle noise
levels for at least the last five years, and four years ago, iirc they
removed all of their accessory pipes except the ones that are
genuinely used at drag racing strips by drag racers (clearly marked
for off road use only, etc) from their catalog, and only offer legal
noise level accessory pipes, now.  They ceded the entire illegally
loud street accessory pipe market to the aftermarket, and they
continually urge rider responsibility and restraint as far as
motorcycle noise emissions are concerned.

They do, of course, tune their bikes and reduce their overall noise
output (induction noise, fin ringing, gear whine, chain/belt noise,
etc) to allow as much as possible of the unique firing cadence of the
Harley 45-degree v-twin to come through within the 81DbA (I think)
federal noise level allows.   That's what Ducati and Triumph do wrt
their exhaust systems, too.   That would be considered intelligent
marketing, in Harley's case especially, since they have built
motorcycles with that characteristic for about 100 years or so, and it
is considered to be a pleasant sound by most owners.   The fact that I
hate it only makes it easier for me to run oem pipes on my Street
Glide.

------
I was referring only to a link posted here about a month ago to an HD video
highlighting their acoustics "lab". It's not especially high tech, but
illustrated a certain marketing and product focus. It wasn't so much that
they had bothered to do so -- I think it's a rather interesting use of the
technology -- but rather the stark contrast to the lack of other development
infomercials. If it matters, I find the loping sound not altogether
unpleasant.



Posted by Bob Mann on October 28, 2008, 8:52 pm
 

Actually, H-D's accoustic lab is very high tech.
There was a segment on it on American Thunder.
They also have a fairly high tech suspension lab as well as others.

--
Bob Mann

Cap'n, ah need moor pow'r.

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