As I mentioned in my intro post ( https://www.superhawkforum.com/forum...023#post221023 ), as much as I love my VTR, I would have preferred if the previous owner left exhaust intact. And not only because of the neighbours - I will also be touring on my bike and that sexy growl/rummble becomes tiring after a while. I know that now for fact, after going out for few long-ish rides. Plus, this probably has to do something with my age, too

So, my question is: short of aftermarkets pipes, is there anything I can do to reverse this bafflectomy effect, another words silence my exhausts?
Any suggestion or advice, or direction to the exsisting post (I was not able to find anything by search) is welcome.

TIA

 

How much has it been opened up? If it's holes drilled in the outer baffle it might be possible to stick a bolt or something in each hole, or a large rivet... If the end-pipe has been taken of, just get an aftermarket exhaust or find a pair of unmolested stock pipes... There are quite a few floating around as others upgrade...

 

1. wear ear plugs. The squishy foam ones. You should anyway, loud exhaust or not IMHO.

2. A guy with a mig (wire feed) welder might be able to seal up the holes if they were drilled. As long as the tip of the mig can get near the hole it can be welded. Basically you stick bits of metal to the edge of the hole until there is no more hole.

 

Hi Tweety, thank for chiming in.
How much opened. I'd say fully. Don't know what you mean by "drilled holes", bellow are few pics I just took that hopefully show how the rear of my exhaust looks like.
And I like the idea of "unmolested stocks", may try that. I am not sure about aftermarket, I believe they are all (or am I wrong) lauder than stock!?!

ETA: Wow, Tweety, just realized you're in Sweden! Huh, power of internet/web!

 

that's a "full" bafflectomy. Aftermarket pipes will probably be louder than that even, your best bet would be trying to find a mint stock setup.

 

I have 2 cans that the previous owner gave me.
Cans are pristine they were used for about 1000 miles before he put on 2 Bros slipons.
Shoot me an offer if you want them

 

Your easiest route would be to buy another pair of stock cans. They're not that expensive. You could probably even trade someone who wants yours.

 

... kind of.
Thanks to comedo, local member, I now have a pair of stock, intact, mufflers.
Thanks comedo, and everyone else for chiming in.

 

...every time I read the title of this thread I think is says "Reverse Vasectomy" hehehe

 

I just learned something. I thought that a full bafflectomy meant that all the internal pipes and the holding plate were removed.

 

my bafflectomy is exactly like yours, which I considered a partial, and it's the best sound IMHO. Not obnoxious, adds a bit of character. Of course with earplugs, which i wore even when the exhausts were stock to cut wind noise and make the riding experience more enjoyable.

 

im considering doing this to my vtr, do youguys have any vid or sound clips of it before and after so i can get an idea of what its like? thanks

 

i first drilled holes around the outer section of the pipe ends and it was better but not loud enough. then I cut around the holes and took the first baffle out by working it back and forth til the internal weld broke. Now the sound is just right. I believe removing the other baffles would be too loud but don't know for sure.

 

oh yea. first post. welcome aboard.

 

hey thanks ill make an intro post shortly, ive got about 30 windows open that i wanna read through, lol. how did you cut out the inner pipe? did you just drill a bunch of holes and then pry it out? skillsaw with a metal blade? i think its gonna be my project for tomorrow as its only a half day at work

 

drilled as many holes as possible and ran it like that for a year or so and then decided to go to the next level. Then cut it with a sawzall and smoothed it out with a file. I like the sound now and will stop there.

 

any aftermarket ones will probably be louder than drilled stock cans

get another set of stock cans off ebay

what i would do myself is wear ear plug for long trips and enjoy the noise on short trips

 

well i did it, 4 3/8s holes in each can. the sound is louder, idle is a bit nicer but also has a weird puff puff sound to it, although in the cooler night air it sounds pretty sweet. i did however notice that theres a power increase. it comes on much smoother than before and feels like its definatly peppier. i chased my buddy down on his 600 f4i tonite much harder than i did yesterday when we did a pull. so i think tomorrow i might put a few more holes into it. almost sounds like a baby harley the way it is now, lol. do you have any sound clips of yours with the baffle drilled before you removed it?

 

I have heard sound clips, but they are not in any way close to the real sound.

.40 shims for the needles, 2 1/4 turns out on the air mixture, and 500 ohms on the TPS(hawkrider's recommendations) along with the rear baffle removed works awesome for me.

 

yeah ive heard of the shim mod. i havent had the tank up yet, do i have to pull the carbs to adjust the fuel screw at all? id like to give it a half turn or more per carb just to add a bit more fuel

 

actually, I didn't pull the carbs off the bike, just pulled them up and tilted to the right(still held by the linkage). I was reluctant to mess with it, but it's really no big deal if you take your time. Take not of where the vacuum lines connect. I think you may need a special tool to adjust the air mixture, but I worked it out with a modified tweezer and then slotted it with a dremel cutting disc so I could use a screwdriver.

 

Actually nath if you have what is on these pics up there you have as full a bafflectomy you will ever get...

The inlet pipe feeds into a chamber, where an internal pipe feeds through two walls to another chamber where the endpipe feeds out... When you completely remove the endpipe like the pictures show, you essentially open up the two chambers, and looking at the middle picture the pipe in the lover corner of the opening is actually the in pipe, feeding through the whole thing... So essentially you have straight pipes with a large chamber at the end for breaking up the soundwaves a bit...

Most aftermarket pipes will be less noisy than this (believe me, I compared with a noise meter)... But certainly more noisy than stock and more than when you only have holes drilled... That is because then you essentially just "leak" air, you still force the sound to mainly go through the maze, some "leak" just as the air but not much...

 

now that's news to me. I assumed that removing the remaining internals would make it louder, and less restrictive. Are you saying it wouldn't be louder, change the sound quality, and/or the performance if every thing is removed and the pipe is clean inside? What about the restriction plate welded inside the mid pipe? If everything was cleaned out, it would get rid of a few pounds, and this is rarely a bad thing. I have reached the point where the sound/performance is right for me, so I'm not inclined to go further with mods that can't easily be reversed, unless I'm certain that nothing will be adversely affected.

 

drilled some more holes, got bored, 11 per pipe now. fired it up, sounds much better than with just 4 holes. weather is looking crappy now and theyre calling for thunderstorms so i just gave her a quick clean with a quick detailer and put her back in the garage

 

Same issue as dannyz. I have a bone stock mint 2000 Firestorm, except the first owner performed a complete “bafflectomy” as well. He did a great job, not a mark on the cans, but I basically have the feeder pipes dumping into two large empty chambers. Sounds great, but too much for me. Any advice on the quietest aftermarket mufflers? Or if anyone has a set of mint OEM mufflers that would be good too.

 

Well, since the exhaust gasses only pass trough the inlet pipe and then bounce around the large chamber a bit before exiting, yeah removing the remaining internals won't change the sound much... Possibly the walls would affect the "tune" of the vibrations in there a bit, but it's stainless and rather thick so I doubt it...

Normally the exhaust would go through the other intact pipe "bouncing" off the wall around the outlet pipe then bounce at the other end and go through the outlet... In a big "S"... Not anymore... You my friend is running as close to a straight pipe as possible...

I'd imagine it would actually make the pipe's a bit less noisy if you remove the internals and chop of a bit of length off the inlet tube... Will make the sound bounce around more before exiting... Could also narrow the opening a bit... Keeps the low grumble but increases backpressure a tad...

 

Thanks for your insights tweety. I would be inclined to remove all restrictions relative to exhaust flow for performance and a little weight reduction and maybe even carb intake restrictors, but I have learned that often it pays to to let well enough alone. Soundwise, I like what i have now, but I always wear earplugs, however not for quieting exhaust, but primarily for wind noise reduction.