| Author | Message | ||
     Duanelr |
This may be an unpopular opinion, but I like quiet exhausts, thus I really like the OEM exhaust. Of course the downside is that they are big and kind of heavy. Neither of these facts bothered me much because it was so low and out of the way. Frankly the bike made plenty of power for me. (I'm 130lbs and an additional 20 lbs over an aftermarket exhaust doesn't bother me.) I've got 44k miles on my bike and and the original exhaust has gotten rusty and pretty beat-up. On Ebay I found an original new-old-stock, still in the box. I bought it for a little over $200. But before I installed it, I had it media-blasted and ceramic coated by a local shop, about $150. It doesn't look like anything special when mounted on the bike, but the ceramic is suppose to never chip and I don't have to worry about it rusting.    | ||
| Zacks |
Did the same treatment/color to my stock exhaust. What a PIA getting the gaskets on - eh? Now perhaps some turnouts on it to quit blowing the exhaust onto the rotor. | ||
| Stevel |
The factory exhaust is excellent and very often better than many aftermarket systems. | ||
| D_adams |
^ Depends on your definition of "better". 14% gain in power over stock? Yeah, been there, done that. Proven results via EBR/IDSPD with a hand built exhaust, hundreds of times. | ||
| D_adams |
I will admit, it is not nearly as quiet as stock. | ||
| Duanelr |
> What a PIA getting the gaskets on - eh? Ya, fsck that. Damn I have walked the fire with those gaskets. I anticipated it this time so I ordered fresh ones from St Paul HD. This time it was a breeze. This was a revelation to me. Maybe every time I remove the exhaust, new gaskets should be used when reinstalling? Maybe this is a rule? (Message edited by duanelr on April 21, 2020) | ||
| Buellrobot |
Quiet was the main factor in my going from V&H back to stock on my X1 and Barker back to stock on the 1125cr. Bought both bikes used w the aftermarket cans, but really don't like the extra noise. That said, Dean, I have always admired the looks of your 1125 exhausts. Barkers, on the other hand, have always seemed poorly proportioned/positioned on the 1125s. Sorry to whoever makes them 🙄. (Message edited by buellrobot on April 22, 2020) | ||
| Stevel |
Dean, You and I have been around the block on this subject before. I do not know how well your exhaust performs in relation to the stock system, I have not tested it. I do know that many after market exhaust systems are really crap. Often they claim a power increase, but very often if it exists at all, it occurs in a really narrow rpm range usually at the cost of torque and drive ability at other points of engine speed. Sometimes changes in the fuel map can improve that, but not always. Further, changes in the exhaust system rarely offer benefit on their own as most laymen believe. An engine is a system of parts working together and changing of just one entity requires other engine changes as well to optimize results. The original 1125 exhaust system works really well. | ||
| Zacks |
Yep, new gaskets and borrowed an exhaust pipe expander from Autozone to tweak the pipes open a skosh since everything compresses when you tighten the clamps. | ||
| Mhpalin |
I own a 08 1125r with a rt3 with the matching EBR ECM and a 09 1125cr with a stock exhaust with the EBR ECM . There is no comparison the R kicks the CRs ass the difference is unbelieveable no I have not had them on a dyno,but with me riding them both and my buddy riding them head to head the r kicks the crs ass. | ||
| Panshovevo |
Mike, is the ECM on the CR tuned to run a stock exhaust? | ||
| Mhpalin |
Yes  | ||
| Shoggin |
Apples to apples, your CR should 'beat' the R at anything other than ludicrous speeds, simply as a product of it's shorter gearing. No way a simple pipe/ECM change is worth that low end advantage. (Message edited by shoggin on April 22, 2020) | ||
| Mhpalin |
The C R kicked my buddy's R till he installed the rt4 and the matching ECM then it was a different story the C R got the hole shot but within 250 meters zoom | ||
| D_adams |
Hmm. Can't possibly be true. There's no appreciable hp increase that would account for this . Well, maybe there is... | ||
| Panshovevo |
No one gonna convince me that performance was the foremost goal in designing the stock 1125 mufflers. If it was, it would be 20 lbs lighter. I have yet to ride a bike with the stock exhaust installed. One of my ‘08’s came with one, so I may try it. | ||
| Stevel |
Let's talk about comparison testing a bit when evaluating the performance of a street exhaust system. There is the noise issue of course and peak power, but beyond that there is fuel efficiency, conservation of available torque, throttle response and lastly, surging or hunting if you will under low engine speed, low engine load (high intake vacuum) conditions. The latter is what drives me crazy. I hate it and the surging is typical for a performance oriented system. It is caused by excessive cylinder evacuation caused by excessive reflected vacuum from the exhaust system. We can overfuel, erroring on the fat side side to compensate, but that raw unburned fuel is still escaping into the exhaust, which does nothing for efficiency or mileage. No question, these after market systems offer a choice. Are those issues created by these performance systems worth suffering for a perceived power increase that may not exist and if it does, it occurs only during a very small fraction of your riding time? Your call. | ||
| Coastrambler |
Okay, I've stayed completely stock power system wise. Have made many ergonometric changes. At times I contemplate getting EBR ECM for stock muffler. What would I get for this? | ||
| Stevel |
Richard, I'm not sure it would help. The drive ability issue at low speed occurs during closed loop operation in the ECM. In that mode it is the O2 sensor that is the driving force. The stock sensor is a digital unit. It has 2 outputs rich and lean switching around 14.9 parts air to 1 part fuel (by weight). In operation the O2 sensor will be continually switching rich/lean/rich lean ect. The ECM will track this and adjust the AFR accordingly. This operation will automatically adjust the AFR for altitude, density and ambient temperature variations. My point being changing the fuel map in closed loop mode won't help without disabling closed loop mode or finding an O2 sensor that allows a richer AFR and I don't think they exist. You could ask IDS and if you do and they can help, please get back to this forum and let us know. | ||
| Stimbrell |
Just to be technically correct it is 14.9 parts to 1 by mass, not weight, you try running your bike on Mars with that ratio by weight and you are going to have problems.  | ||
| Mhpalin |
Richard I have EBR ECM in my stock CR the improvements are the bike will idle in first gear smoothly, way better throttle response and a slight improvement in overall power plus 500rpm higher redline.I was very happy with the improvements over stock tune. | ||
| Panshovevo |
The O2 sensors used on a stock 1125 injection system are indeed narrow band sensors. Tuning kits such as the Power Commander V w/Autotune replace the narrow band with wide band. I’m sure someone good with electronic fuel systems could pick up a pair and wire them in. They take five wires, as I recall, with the addition of a preheat circuit (I think) | ||
| Stevel |
John, Unless IDS sells an ECM with the narrow band to wide band O2 sensor conversion, it would be very difficult to do. If the wide band sensors have preheaters, they are driven by PWM provided by the ECM. Not all wide band O2 sensors have heaters. In all cases the output signal is analog and the ECM would need OP Amps to interpret the output. So you are really talking about a completely new design ECM. |
