| Author | Message | ||
     Txfuzz |
I don't want to fork out for a new aftermarket exhaust on my 1125R just yet...has anyone seen modifications to stock exhaust that deflects the exhaust away from the back wheel??? | ||
| Hughlysses |
IIRC somebody here welded on a couple of 45 degree stainless steel pipe elbows to theirs. It looked like a factory job. | ||
| Txfuzz |
Thats what I was thinking about doing....just trying to find someone who can do it...or someone who makes them | ||
| Chevycummins |
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| Hughlysses |
Here's the ones I was thinking about:  Here's the thread on the mod: http://www.badweatherbikers.com/buell/messages/290 431/337772.html | ||
| Bcrawf68 |
Hey Chevy, did that change the pipe. That is, did it flow better? | ||
| Zac4mac |
Ever since this bike came out, one of the biggest complaints has been the exhaust on the rear disc. I am guilty of making a lot of noise in this direction, myself. I even bought a Drummer to get away from the "problem" and get the sound I wanted. BUT!!! While talking to a BMC rep at the Dealer show I realized, finally, why BMC did it and still has it that way. They have engineered a pipe that PERFORMS while meeting EPA requirements. One of the final(since I saw 1 pic of a late prototype with turn-out exits) tricks to pass the noise limits was pointing the exit at the disc to further break up the pulse and noise. The engineering in this bike never ceases to amaze me. Zack | ||
| Ponti1 |
Zac, that kind of amazes me. How does Buell have to go through all this to get a bike to pass? It is one of the most quiet 2-wheeled vehicles I've heard when in stock form, and I just don't get why all the claims of needing to do things to pass noise restrictions. To be clear, I am not doubting any of the claims and have no evidence to the contrary, but just don't understand it. Go test ride any bike and then immediately ride a stock 1125R...The R is SUPER quiet. My stock Harley made twice as much noise at any RPM as this bike. | ||
| Avc8130 |
No way the R is the quietest. I almost failed NJ inspection because the inspector thought it was too loud! ac | ||
| Ccryder |
The operative word is "thought". WHere was his sound meter? Did he have the proper distance and background as well as rpm and speed? Lots of variables to do a real sound test. In the EPA test you are not just listening to the exhaust, you are listening to ALL the engine sounds. | ||
| Avc8130 |
CCryder, NJ does NOT use sound meters, distances, or any REAL test for inspection. They merely use the inspector's judgment. Seriously. It took some convincing and repeatedly showing him the EPA stamp to calm him down. ac | ||
| Ponti1 |
Before I drilled the exhaust outlets my bike was hard to hear over the Vespa LX150 that parks beside me at work. Silent but deadly! | ||
| Ccryder |
When I lived in Wichita KS back in the early 70's, they passed a "broom handle" noise test. If this calibrated handle (a tape mark) went in too far then you got a ticket. I had a Ducati Dianah MKIII with a stock DOT stamped reverse cone megaphone, no baffles. I got tested one evening and of course failed. Got a ticket and went to court a few days later. I pleaded not guilty. I ended up showing the Judge the DOT stamp and he let me go. Speaking of REALLY pissing off the LEO's!! Anyway, I traded it in on a 1974 750 DUcati GT, what a ride!! Anyway, I would have thought at least NJ would have progressed further than what you described. I really think he was just giving you a hard time since the muffler has the DOT stamp, he really does not have a leg to stand on. | ||
| Ducdood9 |
One of the final(since I saw 1 pic of a late prototype with turn-out exits) tricks to pass the noise limits was pointing the exit at the disc to further break up the pulse and noise. __________________________________________________ You believe that? | ||
| Unibear12r |
YES! Think about it. | ||
| Ducdood9 |
I agree it would be effective. My intent is that the worlds largest muffler (dogbone) could be made to do it but this was probably faster and cheeper then reworking the muffler. Maybe on the 2011 model? | ||
| Court |
You believe that? Yes | ||
| Badlionsfan |
I'm sure it's the rear wheel spokes and not the brake disc that works the magic on exhaust noise. | ||
| Avc8130 |
"The world's largest muffler" is to keep the volume (internal capacity, not noise) large to keep power up while keeping the volume (noise, not internal capacity) within EPA limits. I don't mind the stock exhaust. I think it looks better than most of the aftermarket offerings because it flows with the bike and doesn't look tacked on. ac | ||
| Chevycummins |
Bcrawf68, It is louder now, the 2 small tips and internal pipes to the tips were cut back so the exhaust has a larger opening to flow through. I assume that it flows better but it sure sounds better. I caught up with a fellow 1125R owner this weekend, he has an aftermarket exhaust on his bike and after he heard my bike he made a comment like "I wish I would have seen your exhaust mod before I bought this for $600". His bike was way too loud for me and pops under decel where mine won't. It was cool of him to let me ride his bike, it was amazing how different they ran and handle and there both 2008 models. His had way less surge at low speeds and he thinks mine runs stronger than his. His bike also turns way easier than mine. | ||
| Bob_thompson |
On the stock muffler; I have gone to my own for sound and performance BUT, the stocker does make good H.P. while meeting EPA standards and, just maybe on a stock bike, it also acts somewhat as an aerodynamic piece on the bottom of the bike to aid in air flow. Notice how rounded, smooth and tucked in it is. Great engineering I believe. Not something we have to worry about when we have full lowers as they do in their race bikes. Compromising is what companies have to do to sell things in this bureaucratic run society. |
