Whitlow Posted September 28, 2009 #1 Posted September 28, 2009 So how many haw drilled there stock mufflers to get a louder sound? How many holes? What size? ans where did you drill. The Sampson Fishtails are just a bit to loud but i could deal with it if I need too.
Bubber Posted September 28, 2009 #2 Posted September 28, 2009 So how many haw drilled there stock mufflers to get a louder sound? How many holes? What size? ans where did you drill. The Sampson Fishtails are just a bit to loud but i could deal with it if I need too. Inlet side baffle. three (3) 1/2" diameter holes. it was loud enough for me!
Whitlow Posted September 29, 2009 Author #3 Posted September 29, 2009 So you drilled the holes on the side where it mounts to the header pipe how far is it to where you drilled? I have my mufflers off now and I did not see anything to drill on that side. HELP!
clogginhogs Posted October 23, 2009 #4 Posted October 23, 2009 Will drilling stock pipes void any factory warrenty?
Color01 Posted October 23, 2009 #5 Posted October 23, 2009 My stock pipes are open ..and I love that sound
Yammer Dan Posted October 24, 2009 #6 Posted October 24, 2009 Do NOT DRILL The SIDE!! I'm not sure how to do it on the 2nd Gens but I don't think you want holes in the side of mufflers.
Art708 Posted October 24, 2009 #7 Posted October 24, 2009 Do NOT DRILL The SIDE!! I'm not sure how to do it on the 2nd Gens but I don't think you want holes in the side of mufflers. I think he meant to say "the end" instead of "the side". ... I hope.
Yammer Dan Posted October 24, 2009 #8 Posted October 24, 2009 On the 1st gens you have to cut the cone off the end to get to the baffel. I'm lost on 2nd Gen muffler.
footsie Posted October 24, 2009 #9 Posted October 24, 2009 The way on the second gen, take a dremal tool with a cut off wheel, go up the output in of the muffler approx 1 1/2 inch and cut the tube all the way around, then push the tube to the side, that's it. sounds great and you can't tell the exhaust has been modified. Gregg
SLOW HAND Posted October 24, 2009 #10 Posted October 24, 2009 can u still hear the " jetson car " sound or does it make that louder too ? if he can fly why doesn't he pass & get outta my blind spot? On second thought he better not because that would bring on the strangest case of road rage yet.
starkruzen Posted October 26, 2009 #11 Posted October 26, 2009 Foots, can you explain more? I'm confused. Thanks
footsie Posted October 27, 2009 #12 Posted October 27, 2009 (edited) If you look in the outlet end of your stock muffler, you will see a tube that runs the lenght of the muffler, these are a reverse flow type muffler, meaning the exhaust gases flow from the input to the back and then back to the frount and back again to be expelled. This is how the exhaust is muffled, there is no plate in the muffler full of holes to muffle the sound, the back and forth flow does it. So if you cut the tube approx 1 1/4 to 1 1/2 inches up the outlet end, and prize it over to one side, the muffler becomes straight through flow, with some backpressure formed by the part of the tube that is remains attached to the rear cone. I have done this to my 2000 and my 2004, it gives a good sound under hard accelleration, and has enough back pressure to prevent the popping. Running down the highway it quiets down, I don't even notice the sound at highway speed. But sounds great running at 55 and around town, but not loud enough to be noticed by Law enforcement. If you look at the mufflers you can't tell that they have been modified, in daytona I have seen Law enforcement stick a billy stick up the end of the muffler to see if the baffle is there, it won't go in. I will try to draw a diagram and post it. You need a dremel tool with a cut off wheel to do this mod, it takes several wheels because they break easily. To me it sound better than the road king mufflers. I am willing to help. Gregg Gregg Edited October 27, 2009 by footsie
KeithR Posted October 27, 2009 #13 Posted October 27, 2009 (edited) Here are some muffler cut away pic's I borrowed from somewhere. Keith Edited July 22, 2019 by Freebird
footsie Posted October 28, 2009 #14 Posted October 28, 2009 You can see in the pics the reverse flow design, the exhaust gases flow to the back, pass back forward through the short tube then flow back out toward the outlet. If you cut the outlet tube into, and push it aside, you can look straight through the muffler. Well not perfectly straight, but you can see through it. The deeper you make the cut the more back pressure you keep, quieter. I have mine cut about 1 1/4 inch from the outlet. Gregg
DavidD Posted November 12, 2009 #15 Posted November 12, 2009 As many time as I read about cutting the mufflers with a dremmal tool and moving a pipe I just don't get what is being done. Can someone post pics so this dumb guy can understand this?
footsie Posted November 23, 2009 #16 Posted November 23, 2009 David Look at the third picture in the post above, toward the right side is the out end of the muffler, you see the tube going into the cone at the very end of the muffler, that is what you are to cut into with the dremel about 1 inch past the cone up in the muffler, once cut it will easily prize over to one side and open up the muffler. Gregg
DavidD Posted November 24, 2009 #17 Posted November 24, 2009 Got it, thanks I will give this a try as soon as I put my new ignition switch in that UPS should be bringing tomorrow.
DavidD Posted December 1, 2009 #18 Posted December 1, 2009 Gregg: I made the cut on my pipes today and they sound great. Has a nice rumble at idal but great sound when you get on it. Not too noisey, just the way I had hoped. Thanks
footsie Posted December 1, 2009 #19 Posted December 1, 2009 (edited) Great, I thought you would like it, I have really enjoyed mine, I have never been one that liked loud bikes, but I do like some sound. You do not get this sound drilling holes in them. This way you can not tell by looking, that you did anything to the mufflers. Gregg Edited December 1, 2009 by footsie
ArticusMedicus Posted May 6, 2010 #20 Posted May 6, 2010 With the method of cutting the tube; Is there enough change in the pressues to cause the need of rejetting or adjustment of the carbs?
SilvrT Posted May 7, 2010 #22 Posted May 7, 2010 Anyone? From all the various muffler mod and swap posts I've read, it's rare to find one where someone has had to rejet. I have the Road Kings on mine with all the baffles drilled out (basically a straight-thru, unobstructed flow) and I don't need rejetting... at least I don't think I do... maybe the scoot does tho LOL You may want to do a re-sync tho.
Guest scarylarry Posted May 10, 2010 #24 Posted May 10, 2010 David Look at the third picture in the post above, toward the right side is the out end of the muffler, you see the tube going into the cone at the very end of the muffler, that is what you are to cut into with the dremel about 1 inch past the cone up in the muffler, once cut it will easily prize over to one side and open up the muffler. Gregg Question why not use a hole saw ab that size and pull the pipe out instead of moving it to the side....
rod Posted May 10, 2010 #25 Posted May 10, 2010 I used a hole saw on mine and it worked fine. You have to wiggle the pipe to break the spot weld on the other end. I hit it in with a hammer and wiggled/twisted it and it came right out on mine. Rod
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