Drilling baffles or not? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 26 (permalink) Old 02-13-2009, 10:45 AM Thread Starter
 
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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.
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post #2 of 26 (permalink) Old 02-13-2009, 11:17 AM
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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...
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post #3 of 26 (permalink) Old 02-13-2009, 11:22 AM
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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.
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post #4 of 26 (permalink) Old 02-13-2009, 01:52 PM
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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


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post #5 of 26 (permalink) Old 02-13-2009, 07:02 PM
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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.

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post #6 of 26 (permalink) Old 02-13-2009, 07:49 PM
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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.
http://www.scootworks.com/shop.cgi/p...34572688.32493

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post #7 of 26 (permalink) Old 02-13-2009, 08:55 PM
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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!

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post #8 of 26 (permalink) Old 02-14-2009, 12:48 AM
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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.

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post #9 of 26 (permalink) Old 02-14-2009, 07:30 AM
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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...

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post #10 of 26 (permalink) Old 02-14-2009, 09:26 AM Thread Starter
 
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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.
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