Posted by crw59@earthlink.net on October 26, 2008, 7:59 pm
It's a given that their engine sound can wake the dead. Is it by
design or is it because of the type of engine used?
Craig
Posted by Michael R. Kesti on October 27, 2008, 10:01 am
"crw59@earthlink.net" wrote:
>It's a given that their engine sound can wake the dead. Is it by
>design or is it because of the type of engine used?
I have run across two or three H-Ds that were surprisingly quiet and
their riders have told me that it was because their bikes' exhaust
systems were factory stock. This makes sense as H-D must be subject
to noise emmision regulations but leaves me curious about what becomes
of the many thousands of stock exhaust systems that get replaced.
--
========================================================================
Michael Kesti | "And like, one and one don't make
| two, one and one make one."
mrkesti at hotmail dot com | - The Who, Bargain
Posted by Bob Mann on October 27, 2008, 10:45 am
> I have run across two or three H-Ds that were surprisingly quiet and
> their riders have told me that it was because their bikes' exhaust
> systems were factory stock. This makes sense as H-D must be subject
> to noise emmision regulations but leaves me curious about what becomes
> of the many thousands of stock exhaust systems that get replaced.
>
I can help there.
They are piled up in back of shops across this continent until they are
shipped off for scrap metal.
Maybe 1 in 100 is re-used.
Part of the problem is that the exhaust is so restrictive that it really
hampers performance. Simply opening up the also very restrictive air intake
requires the exhaust to be replaced.
This is necessary to get any real measure of usable preformance out of the
bikes.
Why?
Because of emmissions partly but mainly noise.
Let's face it....A large displacement, air cooled V-Twin motor is going to
be noisy. All that noise ends up coming through the exhaust so the mufflers
have to be far more restrictive on that type of bike than most others.
I have, at the moment, a totally stock Harley which is pretty quiet,
especially when compared with my previous "performance" Harley.
By the end of this week it will probably no longer be all that quiet but it
will move far better. It should still be far less noisy than the previous
bike though.
--
Bob Mann
Cap'n, ah need moor pow'r.
Posted by Calgary on October 27, 2008, 7:40 pm
wrote:
>> I have run across two or three H-Ds that were surprisingly quiet and
>> their riders have told me that it was because their bikes' exhaust
>> systems were factory stock. This makes sense as H-D must be subject
>> to noise emmision regulations but leaves me curious about what becomes
>> of the many thousands of stock exhaust systems that get replaced.
>>
>I can help there.
>They are piled up in back of shops across this continent until they are
>shipped off for scrap metal.
>Maybe 1 in 100 is re-used.
>Part of the problem is that the exhaust is so restrictive that it really
>hampers performance. Simply opening up the also very restrictive air intake
>requires the exhaust to be replaced.
>This is necessary to get any real measure of usable preformance out of the
>bikes.
>Why?
>Because of emmissions partly but mainly noise.
>Let's face it....A large displacement, air cooled V-Twin motor is going to
>be noisy. All that noise ends up coming through the exhaust so the mufflers
>have to be far more restrictive on that type of bike than most others.
>I have, at the moment, a totally stock Harley which is pretty quiet,
>especially when compared with my previous "performance" Harley.
>By the end of this week it will probably no longer be all that quiet but it
>will move far better. It should still be far less noisy than the previous
>bike though.
Just out of curiosity, what kind of pipes are you putting on it?
Posted by Steve Parker on October 27, 2008, 5:33 pm
Oddly enough a lot of "Old Wing" (Honda GL1000) riders have adapted
stock HD's to their bikes. Works really nice, and much less expensive
than OEM replacements. (If they can be found.)
Steven Parker
1978 Gl1000 - Daily rider
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>design or is it because of the type of engine used?