Ducati Monster Forum

at some point i'll go for the full termis package, but until then, anything i can do to make the bike louder? i've read on here about open air box, what is that exactly/what does it do...and does it make the bike louder?

thanks.
tt

opening the airbox lid (chop/removal/etc) will let the bike suck more air in.

some like the sound, some don't.

coring your stock cans will make them louder, too. there should be a 'how-to' up by now  [thumbsup]

I chopped and cored the stockers (620 cans) to put on my 695:

Remove the cans and the mounting bracket screws. Then slide the sleeve down with some force as they are tight. Because of the pipe
angle where it connects to the header, you can't take off the sleeve. That is the really bad part about it because you have to work with the sleeve only part-way slipped down.

You will notice that there are welds holding the cap in place. The welds were the most difficult part for me on this project. I worked the welds before cutting off the end (I chopped 3" off the can) so I had something to hold. After cutting the welds as deep as I could with a Dremel, I took a flat screwdirver and started gently prying all around. As I worked the caps this way, I was able to Dremel deeper. When I thought I had cut as far as I could with the Dremel, I used a hammer and the flat screwdriver to knock off the cap the rest of the way. I was careful not to bend the cap too much.

As far as cutting the sleeve, I chopped mine about 3". So, after I got the cap off, I put the sleeve back in place and bolted the hanger back on as a keeper. I then used a miter saw to cut through the entire can (multi-purpose blade). I suggest also clamping the can before sawing as mine moved a little even though I put some serious pressure on it while cutting. After I cut through the works, I did Dremel the outlet pipe back some into the can (about 1").

After all that, I put the cap back on, slid the sleeve back in place, and I then drilled three holes (they hit about the middle of where the cap slips over the can)--top, back, bottom. The holes were big enough for the rivets I used. After drilling, I riveted it together. So, the rivets went through the sleeve, cap, and can, The sleeve circumference does not allow you to rivet the cap under the sleeve; they will not go
back into place.

(http://farm3.static.flickr.com/2051/2497293869_acf2dff045.jpg?v=0)

(http://farm3.static.flickr.com/2191/2497292217_241242cafa.jpg?v=0)

(http://farm4.static.flickr.com/3170/2497294035_9f5f3b2aa4.jpg?v=0)

Link to my vid: http://www.youtube.com/watch?v=8iXU7ORIwhU

The simplest, cheapest mod is to remove the screws you have in the middle of each exhaust pipe.

I actually just bought a second set. My plan is to drill a small whole through the center of each one, and see how that sounds!  [thumbsup]

pic please?  i am a visual kind of guy... [thumbsup]

Done! For the second cylinder, the same screw is near your rear suspension spring.

(http://i293.photobucket.com/albums/mm47/roy-nexus-6/ducatiS4_v2_screw.jpg)

isn't that where the O2 sensor is on the 695?

I honestly couldn't tell you  :-[ I am a n00boramus.  :(

I'm about 90% on that one... island_duc has a 695, and I'm pretty sure that's where it screws in.

been a while since I've seen it, though, and my bike's not closed loop, so I've got that plugged up hole, too.

Yeah teddy, I think you are correct.

w00t! confirmation from a 695 owner! :)

I am not crazy! about that anyway...

no comment.... [laugh]

well, I *am* a goalie, so that sort of says... alot... ;)

Unfortunately, you are both wrong. Those screw holes are meant for exhaust gas testing of each cyl individually...

Ok! So what effect (if any) would there be on the bike if those screws are removed?  ???

Honestly, I don't know. But I'm sure it would add a lot of additional noise. Whether it would sound good or not, I don't know either...

Yap, it's definitely too noisy for me - that's why I've bought as second set of bolts - drill a small hole through them, and see how that sounds.  [thumbsup]

Are you seriously considering leaving open holes in your header pipes to get more noise?  That's crazy!  Follow the instructions in the earlier post on how to modify your existing cans and you'll be pleased with the results.  You can even shorten them for more sound.  There are countless threads around about how to "core" your stock pipes, and there used to be a guy on here (Strati?) that did them on an exchange basis for reasonable money.  I've done a few and it's fun and relatively easy.  Ship me yours and I'll do 'em cheap.  Whatever you do, don't run the bike with open holes in your header pipes.

makes sense seeing as how my pipes have those plugged up bits, and it's aon 05.

so where does the O2 sensor go?  ???

I don;t know about the 695, but it's on the back side of the udder on the S*R bikes...

I'm still plenty certain they stick in in that hole on the 695, at least... even if that wasn't the original intent.

 ???

That hole is too small for the O2 sensor...

Yap, I'm seriously considering it, for the following reasons.

1. I'm going to shorten my pipes, but not core them per se - a little increase in volume and tone, but not too much: don't need the attention from the police.
2. removing and drilling the screws is a fast, cheap, ultra easy mod. I don't know if it'll work, but I'll find out when my bike comes back. The attraction for me is that you wanna be noisy - drilled screws in. Puttering around suburbia - stock screws in: it takes all of two mins.

 [thumbsup]

I think just drilling holes in those caps might result in a high pitched whistle instead of the sound you may be looking for....

Found a picture of where the stock 695 O2 sensor goes.

This was taken after I put on the Termis, but before I had the shop put on the new ECU and replace the O2 sensor with the plug.

(http://paularickert.net/albums/userpics/o2sensor.jpg)

(http://paularickert.net/albums/userpics/o2sensorb.jpg)

At least the 1K has it on the udder where it can read a mix of both cyl. But maybe that's the problem...

Drilling holes in your header pipes will certainly make noise, and also likely reduce power.  The physics behind this are too long and boring to explain here, but it is the reality.  You may also find it creates a lean condition that will result in backfiring on decel, among other things, and could even be harmful to the engine.  This experiment could cost you more than slip-ons if you're not careful. 

*sigh*

poop in my cheerios w/the truth. it's been a rubbish day anyway.





 ;)