| Author | Message | ||
     Steveford |
I'm going to chuck the stock muffler on my Firebolt and understand that the Buell Race Muffler kit isn't all that wonderful. I'm looking for a bit more noise (although not deafening), durability and more power, of course. Any recommendations with dyno charts and vendors? Thanks, Steve Ford | ||
| Bykergeek |
The Latus offering will not disappoint in the Louder and Dyno departments. Check the other recent threads for a dyno chart. I had one but it was a little louder than I wanted; otherwise a great product. | ||
| Miguel |
 Or put one `o these on!! | ||
| Bykergeek |
That almost looks like a stock sportster pipe on the end of that collector. Did you make it? | ||
| Miguel |
Yes I did. Stock Sportsters have two pipes dont they? Heres a picture of the muffler, I didn`t get to making a new bracket yet,and the outfall is angled to clear the fairing lowers.  | ||
| Blake |
Miguel, More info please! Your profile info is all hidden. Uncheck the "hide" boxes so we can see you profile? | ||
| Bykergeek |
From that angle, it is definitely not sportster  Looks Good. What is the core like? | ||
| Psychobueller |
My friend had the D&D pipe put on his XB9S along with a hi-flow and the ECM. It made 73hp stock and 71.5 with the pipe. Why wasn't he able to see any gains? It does sound nasty though! | ||
| Bykergeek |
I put the Wileyco on the Firebolt and rode it a bunch this weekend. Sounds incredible, looks good. No idea on the Dyno but there did not appear to be any new dips in the torque curve. I don't like the mounting system for the chin fairing but I kind of like the look w/o it and may not bother. | ||
| Blake |
There is much more to judging performance than simply peak HP. For instance, the race kits for the 1,200cc Buells did not significantly increase peak HP. They did however provide a HUGE boost to performance. | ||
| Psychobueller |
I do know that the XB9R that I rode on Saturday had the Buell race kit and has been a dealer demo for all of its 2400 miles. It has some real snot in the midrange, which it didn't have when the kit was first installed. Does the ECM "learn" and change over time? I was shocked how hard the bike pulled. | ||
| Blake |
If when installed the Adaptive Fuel Value (AFV) is not set close to the optimum value required, the bike would need to be run under load at moderate rpm for a length of time in order for it to self calibrate. If the dyno operator did not allow for that in any way, the new ECM/AFV may not have been optimum, and so the dyno results may have been compromised. | ||
| Xb9 |
I noticed it took three or four short rides before my stock ECM adjusted to my stock muffler flow modification. After it adjusted I was also astounded how much better it pulls, really big change in the mid and high end. Nice thing about this mod is it is barely louder than stock. | ||
| Aaron |
The NRHS/Force Signature Series Pipe for the XB9:     | ||
| Buelliedan |
Aaron, Is that your RR in the background? | ||
| Aaron |
Yeppers ... leave it to Buellidan to notice that! You want one, you know you do ... | ||
| Matty |
20 ft/lbs?! That is freakin amazing. No wonder you're having an off idle burp -methinks that may be the motor trying to leap out of the chassis. Congratulations yet again =) | ||
| Thunderbolt |
holy...Aaron, exactly what changes were made to that bike that made 87.4hp? | ||
| Buelliedan |
Aaron, Damn straight I want one. It would complete the collection. Know where I could get one under $5,000  | ||
| Aaron |
"exactly what changes were made to that bike that made 87.4hp?" NRHS Signature Series Exhaust System w/baffle Power Commander (used the X1 model, Dynojet ain't making an XB model) Optional Dynojet high performance oxygen sensor Careful mapping of the Power Commander NRHS can provide the Power Commander with this map pre-loaded. It uses the stock ECM. We found that even the race ECM could not adjust enough to compensate for this pipe, it flows so well. The Power Commander is mandatory. As I mentioned on another thread, the XB9 we did this work with has a slight off-idle stumble that we could not tune out. It's all cleared up by 2000rpm though. We felt it was minor enough that we could go forward with the pipe, but I want people to know about it before they order. Curiously, the XB12 doesn't exhibit this symptom. It pulls clean right off idle. | ||
| Thunderbolt |
wait a second, you make those same type of changes (race pipe & PC) to a 1200cc bike (e.g. an x1), aren't you looking at just about the same hp? How do you account for the giant leap in hp/ci?? Do you guys have anything else on tap (other than the 1200cc kit) for the XBs? (cams, etc.) Have you experimented at all with redlines north of stock? problems? | ||
| Aaron |
More hp per ci comes from the fact that it's both a smaller and oversquare motor. It has just as much room for valves as an X1 but without as much volume to fill. Plus the XB comes with a little more cam (.550 lift) and a little better heads than an X1, as well as the semi-downdraft dealie. Yes, we have an XB cam grind in the works. It's already in our catalog but it's not quite ready yet. No, we haven't experimented with more rpm. We're focusing on street bikes, not race bikes. To turn more rpm you'd have to buy a very expensive race only ECM as well as some better connecting rods, and that ain't cheap to do on these pressed together cranks, not too many places that can service them. | ||
| Hondaamer |
HEY GUYS, I JUST PUT THE RACING KIT ON MY XB9R. I THINK IT SOUNDS GRRRREEEAAAT, BUT I DON'T SEE MUCH INCREASE IN TORQUE OR HP. THE CUTOUT ON THE REDLINE REMAINS THE SAME AT 7500RPM, BUT I GET A SLIGHT LOWEND STUMBLE AND A LITTLE GURGLING AT A STEADY 3200 RPM. ANYONE ELSE NOTICE THIS? I ALSO PAINTED THE MUFFLER WITH BAR-B-QUE BLACK FROM HOME DEPOT. IT WON'T RUST OR LOOK DIRTY LIKE IT DOES IN SILVER, MAKES A BIIIIG DIFFERENCE. | ||
| Mikep |
Xb9, Exactly how did you modify your stock XB9 muffler? mikep | ||
| Xb9 |
Here's what I did. Only made it a little bit louder, but helped the midrange alot. Took out the dip, just pulls steady now from 3 all the way up. Still comes on stronger when you hit 5K. Cut an "H" pattern in the top of the muffler just a little wider than the jack point markings. Open each side of the top of the muffler up and back so you can get to the innerds. Careful not to crease the metal where it is bending. You will see there is an inner canister within the muffler. Cut that open and peel it open the same way (H). Within this inner canister, cut out nearly the full length, and half the diameter of the second and third pipes (based on flow direction). The halves you cut out should be facing each other. Weld up the inner canister, then the outer canister. I've now ridden it over 500 miles, and seat of the pants, it's increased the midrange pull, and the dip has disappeared. Feels stronger on the top also. I also have a Latus to compare it with, the Latus only feels stronger from 5K on up, and not a huge amount. The Latus also appears to be fat on the A/F mix on the low end, stock ECM. With this stock muffler modification, the low and mid range pulls much stronger than stock. A/F on the low end is as good as stock. This is with the stock ECM and air filter, I will be installing a Race ECM next week to see if it dials in the mixture better on the low end with the Latus. I plan to eventually get a dyno run with Race ECM, Modified Stock Muffler, and Race Air filter. | ||
| Wyckedflesh |
Aaron, you say you have set up an XB12 also? Can you email me with the info on what it would take to set mine up the same way? wyckedflesh@hotmail.com | ||
| Oneway |
I have new XB9 with 1000ml in 3 weeks seems like the motor noise is getting louder sounds like primary noise any one else had this? | ||
| Blake |
Oneway, The primary chain will stretch significantly during break-in and a loose primary chain will make noise and cause vibration. Your tensioner probably needs adjusted. Be sure to follow the service manual instructions precisely (set tension at tightest point). |
