Drilling baffles or not? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
VN750 General Discussion

LinkBack Thread Tools Display Modes
post #1 of 26 (permalink) Old 02-13-2009, 10:45 AM Thread Starter
Join Date: Jul 2008
Posts: 50
iTrader: (0)
Drilling baffles or not?

Looking for advice, here.

I am kind of on the fence here, and if anyone read any of my my prior posts, you will know by now that I am afraid of doing anything that can't be undone. I've had my '99 750 since last summer, and haven't customized anything. (Yet?)

I would really like a throatier, deeper, maybe louder sound, and dont know if drilling the baffles would do it, or if I should look into other pipes. If I change pipes, re-jetting may be an issue? What about with drilling? Still need to make adjustments? It is hard to hear a real difference on internet videos.

All of the advice and knowledge I have received here has been golden to say the least. So here I go again.

What do you have and what was involved? Thanx.
dev110 is offline  
Sponsored Links
post #2 of 26 (permalink) Old 02-13-2009, 11:17 AM
Senior Member
LibertyPilot's Avatar
Join Date: Jul 2008
Location: Titusville, New Jersey
Posts: 6,429
iTrader: (0)
This question has been posed many times here and once even by me. Here's what I got as a result. I'm sure others will chime in and let me know if I'm off base anywhere. There are several steps you can take to get a throatier and louder sound. In order they are:

Step 1: de-goat. Check the vs for advice here, there's all sorts of posts there about it.

Step 2: drill the baffles. Make sure you don't go too far in and puncture what's behind them though. This will give you a louder but not too much louder sound and it will be throatier, no rejett needed.

Step 3: get V&H pipes. I have them and they are much louder and throatier but not obnoxiously loud. They give the bike a sleeker look, drop the weight a little, and give her a few more horses. The baffles are removable but don't do that unless you plan to raise the dead. No rejett needed with V&H. If you're going this route, don't pay over $322 for them, no need.

Step 4: get cobra pipes. These are the loudest for our bikes and I'm sure someone who has them can tell you all about them.

Good luck...
LibertyPilot is offline  
post #3 of 26 (permalink) Old 02-13-2009, 11:22 AM
Members who have donated towards server costs
750Doug's Avatar
Join Date: Apr 2008
Location: S.E. Michigan
Posts: 2,850
iTrader: (10)
Opinions are all over the map so you pretty much have to read as much as you can and make a decision.

Drilling is cheap and quick but not fixable. Alot of folks who don't care for the loud "open pipe" sound seem to like this. And removing the goat belly/power chamber from underneath with make it a bit louder but takes some work to fill in the space, though a replacement kit is available for around $65 I think.

Cobra pipes, Vance and Hines, and Jardines are popular choices and most people who use them seem to like them, but this is an expensive "test", though easily changeable if you save all your old stock stuff. Pipes are louder than drilling by far, but again it's taste. Some really like them, some think too loud. Of the three, the common consensus around here is that Jardines are the loudest of the three. Also, do you want the pipes to be on the same side as the bike, or one on each side? Another thing to consider.

There is no easy answer to this question, you just experiment until you find what you like. When I got my bike I went thru 3 different exhaust system set-ups in just a few months until I found what I liked.

Drill the pipes and see what you think. If you want a little louder than pull the goat belly. (or vice versa)
Good used stock mufflers will be easy to get, and cheap to if you want to undo it, it won't be too bad.

If drilling and removing the GB isn't loud enough, then switching to new pipes will be the next step. Often times good used pipes can be found on Ebay or here for a reasonable price too.

Good luck.
750Doug is offline  
post #4 of 26 (permalink) Old 02-13-2009, 01:52 PM
carbon unit
kay's Avatar
Join Date: May 2008
Location: Country Created by Geniuses, But Run by Idiots...!!!
Posts: 369
iTrader: (1)
I think it's a bit too loud but I can't help but love the way this twin sounds.
would like to have it



2010 Triumph Speedmaster
1995 Vulcan750
1989 XT350
1959 M38A1

Last edited by kay; 02-13-2009 at 02:03 PM.
kay is offline  
post #5 of 26 (permalink) Old 02-13-2009, 07:02 PM
Members who have donated towards server costs
fergy's Avatar
Join Date: Mar 2006
Location: Kyle, Texas
Posts: 4,054
iTrader: (3)
Just one more with experience with all these scenarios. I started out by drilling my stock pipes to try to get more throatier sound. I then bought a set of dynas to replace the stock mufflers. During the process of fitting and fabbing the the mounts for the dynas, I started my bike with just the goats belly on it, with no mufflers. I was shocked to find that it didn't sound much different, if it was any different at all. So I decided then that I would live with the dynas until I got some money together to buy an entirely new exhaust system. I decided to go with the V&H cruisers. They were extremely easy to put on, fit was perfect and I had the bike started up with them on in less than two hours, including the time to remove the old exhaust and GB. The sound was stunning. Make no mistake. This wasn't a small change in sound. It was huge. I love how the bike sounds when I roll on the throttle, how it sounds just sitting and idling. I had it inspected a few months ago and the guy started up my bike and rode off on it and I was so proud of it's sound, I can't even tell you. The only way I can explain it is it went from a muffled, lawn mower like sound to the sound of a V-Twin. I wouldn't remove my baffles as it is plenty loud the way it is. It makes riding my bike even more a thrill than it was.

Kyle, TX VN750.com member #707 VROC#19556
2002 VN1500 Classic
Spline Lube Procedure, with photos, R/R Relocation and Coil Mod
Rusty Tank Cleaning!
Electrical Fault Finding Flowchart

fergy is offline  
post #6 of 26 (permalink) Old 02-13-2009, 07:49 PM
Ccspinner's Avatar
Join Date: Feb 2006
Location: Chicago land
Posts: 2,576
iTrader: (9)
Send a message via Yahoo to Ccspinner
I agree, you can degoat with a Scootworks kit with no damage except maby gaskets.
If you don't like it you can go back.

Chad Falstad "Hawk"
Vroc #17649
2011 HD Ultra Classic "angel"
2001 Nomad 1500 Sold March 2012
2001 VN 750 "Sold June with 2008 with 21,000""Serinity"
Ccspinner is offline  
post #7 of 26 (permalink) Old 02-13-2009, 08:55 PM
CWO3 Navy (Retired)
cliffhusn's Avatar
Join Date: Sep 2008
Location: Maryland
Posts: 722
iTrader: (7)
I went with Jardine Rumblers and while they were loud at first, now that I am used to it I love them! It sounds like a real v-twin now!

The Flag on my bike honors those who serve our Country and those who have served!
cliffhusn is offline  
post #8 of 26 (permalink) Old 02-14-2009, 12:48 AM
jetpilot's Avatar
Join Date: Feb 2007
Location: Rupert, Idaho
Posts: 74
iTrader: (0)
I drilled my baffles and the sound is better. I have not degoated yet. I decided to take the time to save up and by the V & H cruisers. I don't want an obnoxious loud, but just the throatier rumble of the V & H. Have heard them on another 750 and they sound great. Fit and finish on the V&H is better than the other brands I looked into, but that is just my 2 cents.

Jim Bowers
'94 VN750 :
Patriot Guard Rider
jetpilot is offline  
post #9 of 26 (permalink) Old 02-14-2009, 07:30 AM
Old Twistie Sticks Rider
Old Dog's Avatar
Join Date: Aug 2007
Location: Country Created by Geniuses, But Run by Idiots...!!!
Posts: 5,072
iTrader: (2)
Well back in the 50s & 60s money was tight and most things were cheaply home brewed, so on my bought new 03 I cut the exausts streight through the goats belly (cut out the X-over, kept the stop & etc. for the center stand) and drilled the baffles and got a sound I liked enough so that when I traded the 03 for the new 06 I swapped the new exausts & goats belly for the old ones... I like the sound and can still hear others with loud pipes, which when riding the twisties and their bikes are behind trees or whatever I can tell if they are getting on or getting off the throttle... I'm probably the only one that likes it like that, but thats me, and with the helment I don't need ear plugs...
Have a good one...Old Dog...

Southern Central Tennessee.......
Now on the Dark Side......
Girl's Bike 09 Sporty xl 1200 Custom...33k + & clickin......
Sportster Owner/Rider since age 72...lol... Rider since Simplex...???
09-xl1200 "C" Vivid Black, Cast wheels w/19" Frt., SE-Stage 1+, X14iEDs...
MicroTach +, Higher wider H-bars, GPS Mt., Mustach bar Hwy. pegs...
Viking Shock cutout Saddlebags, Rear Mt. Signal Lt. Kit, Fork Brace...
RoadKing Air Shocks, Mustang Seat, Progressive Fork Springs...
Old Dog is offline  
post #10 of 26 (permalink) Old 02-14-2009, 09:26 AM Thread Starter
Join Date: Jul 2008
Posts: 50
iTrader: (0)
Allright, screw it. This weekend I'm gonna drill, baby. Time to stop being such a dweeb.

By reading all of your posts (thanks much) I can always get another set of stock pipes, or go V&H, or maybe de-goat another time.
dev110 is offline  
Sponsored Links


Quick Reply

Register Now

In order to be able to post messages on the Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Once registered, your User Name"cannot be changed". We can make exceptions within 7 days, but after that, it is set in stone.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome