Touring Models Road King, Road King Custom, Road King Classic, Road Glide, Street Glide, Electra Glide, Electra Glide Classic, and Electra Glide Ultra Classic bikes.
Sponsored by:
Sponsored by:

?? modified stock muffler

Thread Tools
 
Search this Thread
 
Old Dec 4, 2008 | 05:53 PM
  #1  
ranman469's Avatar
ranman469
Thread Starter
|
Road Master
Joined: Oct 2007
Posts: 1,028
Likes: 1
Question ?? modified stock muffler

hi i have a 09 ultra. i wanted more sound so i got some stock cans from flea bay and I drilled out the cores through th end tubes. i love the sound, no backfire .

but i have read some posts about this can lean out a already lean motor. i have only put about an hour on the bike so far since the mod. i have no others done its all stock.

am i looking for trouble or do you think things will be all good. i have done these tricks to my sports bike with no problems. but this is my first HD .

here are some pics. please give me you educated opinion of this mod.
yes i know new slip ons would be best, but things are tight.
my concern is will i do damage?
 
Attached Thumbnails ?? modified stock muffler-dscf4475.jpg   ?? modified stock muffler-dscf4473.jpg  
Reply
Old Dec 4, 2008 | 06:02 PM
  #2  
xxxflhrci's Avatar
xxxflhrci
Extreme HDF Member
Joined: Sep 2006
Posts: 10,033
Likes: 29
Default

As long as you haven't changed the air cleaner to a more free flowing one, you have nothing to worry about.
 
Reply
Old Dec 4, 2008 | 06:06 PM
  #3  
ranman469's Avatar
ranman469
Thread Starter
|
Road Master
Joined: Oct 2007
Posts: 1,028
Likes: 1
Default

no other mods only the moded cans
 
Reply
Old Dec 4, 2008 | 06:27 PM
  #4  
Cryptoboy's Avatar
Cryptoboy
Seasoned HDF Member
Veteran: Navy
Joined: Dec 2003
Posts: 7,090
Likes: 3,882
From: Murfreesboro , TN
Default

Originally Posted by xxxflhrci
As long as you haven't changed the air cleaner to a more free flowing one, you have nothing to worry about.
I agree!
 
Reply
Old Dec 4, 2008 | 09:07 PM
  #5  
ranman469's Avatar
ranman469
Thread Starter
|
Road Master
Joined: Oct 2007
Posts: 1,028
Likes: 1
Default

thanks guys!
 
Reply
Old Dec 5, 2008 | 06:36 AM
  #6  
HarryDavidson's Avatar
HarryDavidson
Road Captain
Joined: Jul 2008
Posts: 564
Likes: 7
From: Sunderland, MD
Default

What size drill bit did you use and exactly where did you drill?

Harry
 
Reply
Old Dec 5, 2008 | 04:34 PM
  #7  
ranman469's Avatar
ranman469
Thread Starter
|
Road Master
Joined: Oct 2007
Posts: 1,028
Likes: 1
Default

Originally Posted by HarryDavidson
What size drill bit did you use and exactly where did you drill?

Harry
hey harry

i bought
1- 1 5/8" and 1- 1 3/4" hole saws
a extion for the hole saws i found a 9" extion
wd-40
3' of 3/4" threaded steel pipe
1-3/4" ip cap and a 3/4" X 1/2" reducer coupling for the pipe.


i drilled first in the outlet of the can with the 1 5/8" saw and keep it cool with the
wd 40, the baffle will come lose from the outlet side when you cut through it.

then flip it over so the inlet side is up and use the 1 3/4" saw and drill until it is cut off from inlet side.

then i used the 3/4" pipe with the reducer on the side that will go in the outlet side of the can, the reducer will center in the baffle, the reducer just makes it easy to keep it centered. the cap is on the end of the pipe where you will hit it real hard i used a 3lb hammer. i sprayed some wd40 in the inlet side of the can and beat the baffle out. it did get stuck. its a pain in the azz, i had to pry bend and drink a beer but it will come out. it bent the inlet side of the can a bit, but i was able to hammer it back to shape.
i`m very happy with the results!!
 
Reply
Old Dec 5, 2008 | 04:35 PM
  #8  
PeeTuneYa's Avatar
PeeTuneYa
Banned
Joined: Dec 2008
Posts: 87
Likes: 0
Default

You are not even close to opening up that pipe to justify a piggy like a PeeSee is you are still clog city is keep drilling is you are not even loud...
 
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Times Harley-Davidson Chucked Tradition Out the Window

 Verdad Gallardo
story-1

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-2

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-4

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

 Verdad Gallardo
story-5

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

 Verdad Gallardo
story-6

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-7

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-8

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-9

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
Old Dec 5, 2008 | 04:59 PM
  #9  
ranman469's Avatar
ranman469
Thread Starter
|
Road Master
Joined: Oct 2007
Posts: 1,028
Likes: 1
Default

thanks but its good for me. i like my tunes, so i dont want to loud. thats why we ride our own bikes so we can do our own thing
 
Reply
Old Dec 5, 2008 | 05:05 PM
  #10  
krusr's Avatar
krusr
Ultimate HDF Member
Joined: Mar 2008
Posts: 5,040
Likes: 3
From: Nice home on the NorCal Coast
Default

Originally Posted by ranman469
hey harry

i bought
1- 1 5/8" and 1- 1 3/4" hole saws
a extion for the hole saws i found a 9" extion
wd-40
3' of 3/4" threaded steel pipe
1-3/4" ip cap and a 3/4" X 1/2" reducer coupling for the pipe.


i drilled first in the outlet of the can with the 1 5/8" saw and keep it cool with the
wd 40, the baffle will come lose from the outlet side when you cut through it.

then flip it over so the inlet side is up and use the 1 3/4" saw and drill until it is cut off from inlet side.

then i used the 3/4" pipe with the reducer on the side that will go in the outlet side of the can, the reducer will center in the baffle, the reducer just makes it easy to keep it centered. the cap is on the end of the pipe where you will hit it real hard i used a 3lb hammer. i sprayed some wd40 in the inlet side of the can and beat the baffle out. it did get stuck. its a pain in the azz, i had to pry bend and drink a beer but it will come out. it bent the inlet side of the can a bit, but i was able to hammer it back to shape.
i`m very happy with the results!!
If this is all you've done the EFI mod should have no problem compensating for the minor change in exhaust.
 
Reply



All times are GMT -5. The time now is 10:39 PM.

story-0
7 Times Harley-Davidson Chucked Tradition Out the Window

Slideshow: Harley-Davidson built its reputation on nostalgia, but every so often, the company took a hard left turn into the future.

By Verdad Gallardo | 2026-05-20 11:18:19


VIEW MORE
story-1
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-2
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-3
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-4
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-5
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-6
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-7
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-8
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-9
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE