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Buell Forum » 1125R Superbike Board » Archives 001 » Archive through March 06, 2010 » Running stock muffler??? « Previous Next »

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Redbuell1203
Posted on Friday, March 05, 2010 - 01:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My question is simple how many are running the stock exhaust and like it? The reason I ask is I haven't heard an 1125r in person with the stock exhaust. I have the one the dealer took off, when they put the D&D on mine. Just wondering if the bike would run any better then the stocker or not. I don't dislike the D&D just looking for any hp that I can get.(yea being a little greedy).
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Lastonetherebuys
Posted on Friday, March 05, 2010 - 01:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I like my stock exhaust but I have nothing to compare it to as I have not riden one with an aftermarket exhaust. The one downside is the tips pointed right at the rear wheel, caliper, rotor makes for a tough time keeping the back end clean. Havent done it yet but am planning on getting some turn out tips that I have seen here a couple times
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Craiga
Posted on Friday, March 05, 2010 - 01:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I had my CR with the stocker for a few hundred miles prior to putting on the D&D slip on. IMO: The bike runs much better with the stock exhaust. The D&D has so much air flow, because it's basically a straight pipe, you loose a lot of back pressure. Loosing the back pressure, I lost a lot of low end power and torque. Power wheelies were no longer possible in 3rd, the exhaust popped a lot, back firing during starts, hard cold weather starts, etc. It got to the point where I took off the billet end cap off the D&D and welded on a plate to the inner steel "baffle" pipe. This plate blocked almost 50% of the outlet. Only then did I regain some of the lost pressure and power. With the D&D I did notice some gained high end (7500+) power gains, especially 3rd gear and higher on highway. This was without any tuner or ecm upgrade. Just my experience. Still attempting to get my FMF which was on Motorcyclesuperstore.com, but they're giving me false hope of coming thru. The bike runs smoother with the stocker, just make sure it's de-noided...
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Xnoahx
Posted on Friday, March 05, 2010 - 02:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'm still running the stock exhaust and I enjoy it. Other than the free spirits exhaust, I think its the best looking one out there. I enjoy being a little quieter as well. These bikes do sound sweet on a pipe though. I might end up down the line with an FMF and a belly pan
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Moosestang
Posted on Friday, March 05, 2010 - 02:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'm running the stock exhaust because everything else is to loud. I'll be getting it dyno tuned with the stock exhaust and K&N filter next week, hopefully.
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Syonyk
Posted on Friday, March 05, 2010 - 02:18 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'm running with the stock exhaust and perfectly happy with it. Well, with the exception of the "dumping exhaust all over the rear wheel" thing Lastonetherebuys mentioned - I'll probably have a local fabricator whip up some turn out tips - nothing radical, just a bit of an arc to keep the exhaust off my rear brake.

For the riding I do (mostly commuting, some weekend fun in the mountains), the stock system is just fine, and as I'm not frequently winding my engine off the rev limiter, I don't care to lose low end power in exchange for gains in an area I don't use much. If I were just tearing up twisties on the weekend with it, I might feel differently.

Also, I don't want to attract unneeded attention from the police. Loud pipes attract attention. Again with the "Commuting daily" bit - I don't need hassles for overly loud exhaust.
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1_mike
Posted on Friday, March 05, 2010 - 03:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

And it continues.

Anyone putting on a "free flowing" exhaust system without modifying the fuel curve is NOT a good thing.

These engines ARE lean from the factory. Been proven countless times. Now a free flowing (straight thru) exhaust is installed and all will be well...!

Same thing with car headers. People think by putting a header on their car engine will wake up some power.
In reality....it'll drive down the driveway with less power.

The fuel mapping NEEDS to be altered to work with the new exhaust (or air cleaner element)...period.
Nothing any wives tales tell is going to change this fact.

Mike
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Jdugger
Posted on Friday, March 05, 2010 - 03:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Running stock exhaust on my two street bikes. The 1125 makes a fair bit of mechanical clatter, and even wrung out on the track that's most of what someone listening to you go by will hear.

I have an FMF on my track bike with race ECM. It's way to loud for street use, but does weigh a good bit less.
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Geforce
Posted on Friday, March 05, 2010 - 03:24 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I bought a D&D and popped it on, then found Dean Adams and he took my stock pipe and built the first stock modded one and I love it. Just loud enough to cover up the mechanical clatter at WOT and quiet enough to ride a block without ear plugs in.
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Redbuell1203
Posted on Friday, March 05, 2010 - 05:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Well all sounds good. I was just wondering if someone might be able to post a good pic of the front mount for the stock exhaust(actually mounted). I think that I might put it back on this weekend. Does it take quite a bit of work to put on the stocker?
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D_adams
Posted on Friday, March 05, 2010 - 05:52 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It really depends on where you want to gain hp at. The D&D loses some on the bottom, but gains a couple up top. If you run the stock pipe, it will probably run a little better on the bottom end.
As far as going back to the stock pipe, there are 7 bolts to either loosen or remove and then install. Loosen the right foot peg bracket (2 bolts) and take off the bracket on the left side of the oil cooler. The dealer should have put a bolt/nut on the right side of the cooler also, but sometimes it gets overlooked. Make sure you have the bolt. There's 4 bolts holding the muffler itself, one more for the right side cooler, 2 clamps and then the foot peg bracket. The nut for the right front bolt that goes through the oil cooler to the pipe is a pain to install, getting your finger in there can be tough, but it will go on. I can get the stock one on in about 15 minutes. Having the bike on a rear stand makes it much easier, especially for the left rear bolt. There are holes in the pulley to put the bolt through.

If you're mechanically inclined, no, it's not a tough job.
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Redbuell1203
Posted on Friday, March 05, 2010 - 08:45 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ummmmm, I am missing the bolts to re-install the darn thing. Went out to look in the box and none of them are in there. I don't have too much problem with the mechanical part. I can take most anything apart and put it back together if I take it apart to begin with, but however I didn't put this muffler on. I appreciate giving me the info on putting it back together D_Adams and to all whom have replied, still would like to find a pic.
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D_adams
Posted on Friday, March 05, 2010 - 09:07 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Very top of the pic is the bottom of the oil cooler. 2 bolts there, one on each side. The dealer should have installed the original bolts back in and put nuts on each one. The right side one in the pic, there's a bracket holding it on to the case by a smaller bolt. Take that off also, it just makes it easier to slip it on. It's just to the right of the oil line at the top of the pic.
The bolts are 8 mm, ballpark 30-40 mm long but I don't know for sure. There are 4 bolts total you'd need, 2 more for the back.





Just above the brake lever should be where the D&D mount bolt is. That same bracket is the one you loosen, but don't take this one off.



Opposite side, through the pulley is the other bolt. The muffler has 3 nuts, you'll need a 4th one for the oil cooler, unless they failed to bolt the cooler on and left it hanging. I can't imagine why they would do that, but who knows.

You should see the nuts that are captured in the bracket on the stock pipe, like these.

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Redbuell1203
Posted on Friday, March 05, 2010 - 09:35 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ok D_Adams just heard your exhaust and you have a nice sounding exhaust there. It has a nice ring to it. So I am only missing the bolt that goes through the pulley. I do have the 3 nuts in the muffler and bolts and nuts are in the oil cooler, so I just reuse the oil cooler bolts and nuts for the front...the bolt and nut that is on the right side...all I have to do is find one for the left side( the one that goes through the pulley). Well off to the hardware store I go. Wish you were closer to help.
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D_adams
Posted on Friday, March 05, 2010 - 10:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Take one of the oil cooler bolts along, it's the same size, or should be.
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