Ducati Monster Forum

...I shouldn't take a die grinder and remove the internals of a stock muffler on a 999?  It's a perfectly good muffler, naturally, but it weighs about 500 pounds and sits roughly even with your shoulders when seated on the bike.

So:  Die grinder removal of essentially everything inside the aluminum canister, then re-weld it!  Viola, super light, riduculously loud superbike.

Yea.

But would I need a Power Commander since the flow through the exhaust system would be greater?

Inquiring minds want to know  [evil]

can I bring my lawn chair and beer to watch?

Believe in what the Nike God's tell us........



(http://rds.yahoo.com/_ylt=A9G_bDj_.bJKEf0AsLSjzbkF/SIG=12lajnpqc/EXP=1253329791/**http%3A//blogg.passagen.se/resources/compost/just%2520do%2520it.jpg)

Hmmm.... let me know if it works.  [moto]

The 999's suck at the exhaust. Why is it that all Ducati's sound awesome, except the 999s? Especially the two valve air cooled bikes. Awesome exhaust sound. Tamburinis also rock, as do the newer 1098/1198 bikes. Something about the under seat twin mufflers. [thumbsup] The 999 under-seat muffler box just sucks. I wasted my money on a standard 999 with a full Termi exhaust when I could have upgraded to a 999S with full Ohlins!!!! Always go for the top of the line suspension over a dumb-ass, over priced exhaust upgrade. You'd think I was old and smart enough to figure that out. :P Apparently not. [bang] [bang] [bang]

There are multiple threads on ducati.ms and ducatisti about coring the exhaust and what to repack with.  I've not seen much about leaving it empty, but I imagine you would be better off repacking it with something super light with some fiberglass on top to keep the already toasty factory pillion warmer from actually toasting your cheeks a golden brown ( please pardon the cheek reference, and rest assured I edited it down from my normal svolochness ).

Search for "coring 999 exhaust" or "cored 999 exhaust".  The articles don't reference any issues with change to backflow on the stock ecu, but one guy said the flat spot around 4k rpm widened bit and he "had it tuned out".

As usual, let me know if you need a guinnea pig ;)

-svoloch 

i've wondered why you and patrick have kept them uncored for so long actually...  i don't know what you're waiting for   [bacon]

not sure you'd need a power commander with out changing the air into the motor also. i know lots of times folks need to richen up the mixture when the airbox is opened up AND the exhaust is opened up or it will run to lean...and coming from that, also run hotter. So they'd richen it up to avoid damage and keep the motor a little cooler.

i don't know...my recent experience with an arrow system resulted in massive popping conditions with the airbox still totally stock...stock filter.

Yeah the popping is often one of two things:
1. Running slightly lean
2. Leak in the exhaust

(Mine came from the latter. The DP reverse megaphones I have/had on the bike never have made a perfect seal).

oh it was both.... it runs SUPER lean, as in i'll even get a pop or two on hard decel with complete STOCK exhaust (it's muffled but i can hear/feel them).  and the arrows leaked on the slip fits to the header pipes.

that's where my leak occurs, even with new sil spaghetti headers. I thought it might take care of it, but the fit of the dp conti replicas is just loose. i did just recently pick up a set of sil/ncr titanium pipes and the fit seems to be tighter. we'll see once i get the rearsets on and everything bolted together. (new pipes are still low and need the rearsets as the brackets)

Very cool, info.  Thanks for the replies; most lead me to believe that this chop/cut/rebuild SHOULD take place.  I mean why not?  What's the worst that can happen?  A totally ruined Ducati motor?  Phhh-t.  I ain't skeer'd...

Totally ruined? You mean "opportunity" for fancy motor work.

 [evil]  Exxx-cellent, Smithers, I like the way you think...

post up so the posse can show ;D

I've found a used canister and long pipe - the one with the second catalytic converter in it - so I think I may go that route instead of having my bike out of comission until I get everything sorted out.

I'm thinking about using a Dremel on the outer casing of the canister; looking at a typical cutting wheel, I think too much material would be removed while cutting, which could make it just that much harder for a welder to put back together cleanly.

We'll see  [evil]   All I really know about this deal is that stock exhuast can is too friggin' heavy.

Thanks for the replies - y'all are great.

well, if they're too heavy, just get rid of them altogether  [cheeky]

I don't have any beefs with my Termi slip on. I think the sound is awesome in fact. I love the sound around the 8 grand mark really. I think that with this slip on can whoever did the work did put a commander on it although I can't swear by it. The bike runs a tad rich but I like that. My performance is great so i'd say find a Termi like mine and enjoy it. JMTC

checking out some more about exhausts and ran across this. CJ can tell you just how to do this mod too. I still suggest the Termi though. Scrolldown till hit 'Deano' and check out the muff mod .avi.

http://www.triumphrat.net/triumph-supersports/86713-my-new-2004-triumph-daytona-600-tornado-red.html (http://www.triumphrat.net/triumph-supersports/86713-my-new-2004-triumph-daytona-600-tornado-red.html)

Cool, thanks for the link.  Power tools, sparks, Ducati pieces.  Ahhh, hand me a beer.

Or twenty.

And I've got nothing against Termis, aside from roughly 1000 bucks.  Several years ago, I found a used set of Termi slip-ons for my 620.  Best mod EVAH.  But they were only 350 bucks.  If I could find a Termi setup for my SBK that was under 500, I'd jump on it but I just haven't seen it, and probably won't.

So I'm thinking hack-n-slash...

I just lucked into some titanium NCR/Sil Moto pipes for my Monster, which are thunderously deep, crazy light, and fit perfect with the sil spaghetti and meatball headers. the deals are where its at.

since exhaust is the topic can someone clue me in on why Termis are so damn expensive?  I've seen them made for non-Ducati's and they are WAYYYYYYYYYY cheaper.

I'm only guessing here, but they usually come with an air filter and ECU for Ducs and Most Ducs come with 2 silencers and most other bikes come with 1.

So now you got me thinking... Me replacing the stock pipes with the Fresco and not doing any mapping or anything... Am I ought to ruing the engine? F*@&K the "perfectly-ruint" engine... Am i safe?

Brian, can you translate that shit ?

- Imean if you change your exhaust without re-mapping ar changing ECU - will it fu&*ck up your engine inany way?

I think that's spot on. My carb'd 900's kit in the DP catalog back in the day was a hell of a lot cheaper than the IE models. In the package: You got pipes. In the IE package: You got filter, ECU, pipes.

So you are paying more for the electronic gizmo and air filter to go with the pipes, however I'm thinking that the DP air filter is no better than the BMC or K&N, but probably costs a lot more.

typically not.  my bike has the full arrow system with stock ecu.  bouncing off of the rev limiter every time you ride may f*ck up your engine in some way.  ;)

I think he has the petros2r/english dictionary that I misplaced. [laugh] ;D I agree with the answer too. You could throw tons of money, Power Commanders, dyno time, etc. at it and the bike may or may not run any better than just slapping on aftermarket cans and doing nothing else. Sure, it may run a little leaner in certain areas of the rev range and it might pop a little more when you chop the throttle. But you probably wouldn't tell much difference as far as the "seat of the pants" dyno. I don't think normal (as in not abusive) use with just a can swap will hurt an engine at all.

Hell, I bet 75% of all the sport bikes screaming around town with full systems or slip ons have had no carb re-jetting or ecu work. Even my GSXR1000 had just a Yosh slip on and nothing else a long time ago. It has a full system now and a custom mapped PC and it seems to be very happy. [moto]

It is my understanding that removing the catalytic converters will not affect the engine's overall longevity since all the changes are taking place on the exhaust side of the engine.  

Would the engine's performance be reduced without also improving the engine's ability to breath - like by adding a high-flow air filter or re-mapping the ECU?  I'm certain it would.  But improving engine performance is NOT the goal with my exhaust mod idea; all I want to do is substantially reduce weight.

The heaviness of the stock exhaust on a 999 is unreal.  I'm not entirely sure since I didn't actually put the part on a scale, but if the exhaust canister weighs LESS than 25 lbs, I'd be amazed.  And, unfortunately, this big chunk of weight is absolutely in the worse place possible when hustling an already porky motorcycle around the race track - up very high and basically cantilevered off beyond the rear axle centerline  :o  There's no doubt in my mind why the aluminum subframes on the mono get stress cracks and break.

Now I'm sure this imbalance could easily be shrugged-off by an experienced rider, but I'm not.  So I'll take all the softballs I can get while I develop my skills.

Performance would not be reduced by removing the exhaust but not adding the high flow filter.

You'll get some benefit from removing the stock exhaust and replacing it with something better flowing, without ever touching the intake or the ECU.

Reprogramming the ECU and or getting a high flow filter would improve the performance further. It'll also correct a slight lean-running condition the freer flowing exhaust will create. However, I haven't read anything that shows engine damage from running aftermarket exhaust without tinkering with the other stuff. The change isn't that significant, regarding flow, the big changes are in weight and sound level (decibels)

For note: the stock monster pipes on the DSS monsters weighed a ton. It was ridiculous. They would have made for a good cricket bat, me thinks.