nklr: descenants, was loud pipes

[Dennis Griffin]

FWIW, I would think that use of a spray on rubberized automotive undercoat or bed liner would considerably deaden the sound waves reflected from the engine. One could also Velcro a piece of outdoor carpeting in place on the top side of the skid plate to obtain a similar acoustic damping affect. It could then be easily removed for use as a kneeler mat for roadside work. If one wanted to be really anal about it, the mounting holes could be enlarged to accept rubber grommets. Then use sleeves, same length as the thickness of the grommets, over the mounting bolts, to tighten against. That should decouple any harmonics being induced into the plate by the engine vibration. I'm inclined to think, however, that with the plate rigidly mounted, any acoustic resonance generated by the plate itself would only be present only within a small RPM range. Cheers, Dennis Scottsdale, AZ '09 KLR650 black

On Nov 7, 2009, at 6:10 PM, GaryS wrote: > For the metal skid plate noise, cut the top off a large tube of > black rtv silicone, squeeze it out and spread it with a flat scraper > to about 1/4 inch thick on the cleaned inside of the skid plate. Let > it dry overnight and reinstall. You should notice about an 80% > decrease in the bell effect of the plate. The silicone helps stop/ > absorb the harmonics of the plate. [Non-text portions of this message have been removed]

[matteeanne@yahoo.com]

My bike does not make any noise even at full revs with horn. I wear headphones. Sean Brown Looking for the perfect gift for the wife/Mom/or "the person who has everything?" www.brownsbirdestates.com To: KLR650 List DSN_KLR650@yahoogroups.com> Sent: Sun, November 8, 2009 3:59:30 AM Subject: [DSN_KLR650] Skid Plate Noise Deadening FWIW, I would think that use of a spray on rubberized automotive undercoat or bed liner would considerably deaden the sound waves reflected from the engine. One could also Velcro a piece of outdoor carpeting in place on the top side of the skid plate to obtain a similar acoustic damping affect. It could then be easily removed for use as a kneeler mat for roadside work. If one wanted to be really anal about it, the mounting holes could be enlarged to accept rubber grommets. Then use sleeves, same length as the thickness of the grommets, over the mounting bolts, to tighten against. That should decouple any harmonics being induced into the plate by the engine vibration. I'm inclined to think, however, that with the plate rigidly mounted, any acoustic resonance generated by the plate itself would only be present only within a small RPM range. Cheers, Dennis Scottsdale, AZ '09 KLR650 black

On Nov 7, 2009, at 6:10 PM, GaryS wrote: > For the metal skid plate noise, cut the top off a large tube of > black rtv silicone, squeeze it out and spread it with a flat scraper > to about 1/4 inch thick on the cleaned inside of the skid plate. Let > it dry overnight and reinstall. You should notice about an 80% > decrease in the bell effect of the plate. The silicone helps stop/ > absorb the harmonics of the plate. [Non-text portions of this message have been removed] [Non-text portions of this message have been removed]

[spike55_bmw]

A rough surface on the engine-side of the skid plate will more effectively dispurse the sound waves that now are directly focused back at you. Problem with that is that a rough surface will give the oil / dirt crud a place to build up but that could also provide more sound dampening. Don R100, A6F

--- In DSN_KLR650@yahoogroups.com, Dennis Griffin wrote: > > FWIW, I would think that use of a spray on rubberized automotive > undercoat or bed liner would considerably deaden the sound waves > reflected from the engine. One could also Velcro a piece of outdoor > carpeting in place on the top side of the skid plate to obtain a > similar acoustic damping affect. It could then be easily removed for > use as a kneeler mat for roadside work. If one wanted to be really > anal about it, the mounting holes could be enlarged to accept rubber > grommets. Then use sleeves, same length as the thickness of the > grommets, over the mounting bolts, to tighten against. That should > decouple any harmonics being induced into the plate by the engine > vibration. I'm inclined to think, however, that with the plate rigidly > mounted, any acoustic resonance generated by the plate itself would > only be present only within a small RPM range. > > Cheers, > > Dennis > Scottsdale, AZ > > '09 KLR650 black > > On Nov 7, 2009, at 6:10 PM, GaryS wrote: > > > For the metal skid plate noise, cut the top off a large tube of > > black rtv silicone, squeeze it out and spread it with a flat scraper > > to about 1/4 inch thick on the cleaned inside of the skid plate. Let > > it dry overnight and reinstall. You should notice about an 80% > > decrease in the bell effect of the plate. The silicone helps stop/ > > absorb the harmonics of the plate. > > > [Non-text portions of this message have been removed] >

[cy4815]

A mouse pad fits nicely.

[Jeff Khoury]

My thought would be spray-on rubberized undercoat. $4.00 per can. -Jeff Khoury

----- Original Message ----- From: "cy4815" To: "DSN KLR650" DSN_KLR650@yahoogroups.com> Sent: Tuesday, November 10, 2009 8:32:23 AM GMT -08:00 US/Canada Pacific Subject: [DSN_KLR650] Skid Plate noise deadening A mouse pad fits nicely. [Non-text portions of this message have been removed]

[Ross Lindberg]

Moose makes a foam pad that fits between the engine and the skid-plate to reduce noise and keep mud and dirt out. I think they are only 8 or 10 bucks. Fred could probably find you one in short order. Ross Lindberg Fertile, MN [Non-text portions of this message have been removed]

[GaryS]

Hahaha!! That's a good one Rick!! g

----- Original Message ----- From: "Rick McCauley" To: dsn_klr650@yahoogroups.com> Sent: Wednesday, November 11, 2009 11:07 AM Subject: Re: [DSN_KLR650] Re: NKLR: Descenants, was loud pipes Actually we all descended from Adam & Eve who lived 6,000 years ago. I believe they were olive skin colored. But that is an assumption. Rick A17 ________________________________ From: fasteddiecopeman To: DSN_KLR650@yahoogroups.com Sent: Wed, November 11, 2009 11:42:40 AM Subject: [DSN_KLR650] Re: NKLR: loud pipes - freedom? You know - this is a FUNNY statement! In all my reading on the matter, it seems that we ALL have a common ancestor in "Lucy", from Africa millions of years ago, who, I'm SURE, was dark-skinned (or black, or negroid, if you prefer), so - "White Supremacist" - kind of an oxymoron.... It's WHO you are, NOT the color of your skin! My .02$ Ed __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com [Non-text portions of this message have been removed] ------------------------------------ List sponsored by Dual Sport News at: www.dualsportnews.com List FAQ courtesy of Chris Krok at: www.bigcee.com/klr650faq.html Member Map at: http://www.frappr.com/dsnklr650Yahoo! Groups Links