running straight pipes

[Evilution]

i am putting together an exhaust system for my xb9r. it is copied after the xb race kit. no it says on there site it is for offroad strictly, why is this. i mean after all its a hopped up sportster motor and i have owned many cammed out high compression stroked 883's with striaght drag pipes. is it just because of the noise? the only reason i ask is this is m first sports bike.

thanks guys,
Marty

[twoguns]

its just because of noise and EPA regulations.

[Evilution]

oh ok thanks man. thats what i expected.

[jakestolar]

I have a straight pipe on my xb12. LOVE it!

[Evilution]

what ecm do i need to run with straight pipes? or will it work with the stocker? If anyone could through my a part number that would be cool. All advice appreciated.

[anrkizm95]

what ecm do i need to run with straight pipes?stock with a custom mapp

[Evilution]

do you have a recommendation on who can do the mapp? I email EBR and they said they do not make an ECM for straight pipes, they said their race ecm may work but would not be optimal. i miss the days of just running drag pipes re jetting the carb and you were done .... :(

[anrkizm95]

http://www.thetuniversity.com/

[theoctopus]

Thanks anrkizm95! [up]

I think I can help you Evilution.

[zdawg123]

If someone would design a drag pipe for the 1125s, I'd jump on that quick! With the help of theoctocpus, the bike wouldn't run near as lean and the worry about burning valves would be lessened drastically!

[UH60CrewDawg]

f someone would design a drag pipe for the 1125s, I'd jump on that quick! With the help of theoctocpus, the bike wouldn't run near as lean and the worry about burning valves would be lessened drastically!

There is a Drag pipe for the 1125s sold by EBR Its just pretty pricey.

http://www.erikbuellracing.com/store/models/1125r/ebr-drag-racing-sidewinder-exhaust-kit.html

[zdawg123]

Yeah, I've seen that kit for sure, but I refuse to pay that kind of money for a pipe with a few bends and curves in it lol.

All a guy would have to do is be slightly creative on how to design a midpipe that runs along the bottom of the bike. Dean Adams has already come up with a great design utilizing a muffler. His Keda RT-2 has a dual outlet. Someone needs to do a drag pipe just like that and then tune it with theoctopus. I'd love to run straights and I would, but I don't want to possibly burn my valves and hurt my engine. I would run them with a proper tune though!

[vtech007]

Have you seen this?:

Buell XB9S Lightning Custom Straight Pipe Exhaust (http://www.ebay.com/itm/Buell-XB9S-Lightning-Custom-Straight-Pipe-Exhaust-/140648010115?pt=Motorcycles_Parts_Accessories&vxp=mtr&hash=item20bf465183)

[vtech007]

Or even this?:

TWISTED CHOPPERS SPORTSTER NIGHTSTER BUELL EXHAUST S/C (http://www.ebay.com/itm/TWISTED-CHOPPERS-SPORTSTER-NIGHTSTER-BUELL-EXHAUST-S-C-/250670006475?pt=Motorcycles_Parts_Accessories&vxp=mtr&hash=item3a5d18c0cb)

[zdawg123]

Just find me one for a Cr and we're set! lol

[lightning SS]

Thanks vtech

[xtreme]

You could always run a carb, like the guys do when they build there mutants. You would probaly have to take a section out of the frame to make it fit.

[vtech007]

Thanks vtech

You are welcome! [cool][up]

[pewee]

Quick question about the straight pipes. I have a xb9r. What's the affect of getting rid of the o2 sensor? Any motor issues? Like many I'm used to older harleys and this is my first bike that came with a computer cable.

[g3STRIKES]

a friend of mine ran no muffler on his buell because he liked the sound lasted one summer,start of this year it jetisoned rear piston, tried to warn him

[Roofer Pat]

So, straight pipes or no???

[snrusnak]

a friend of mine ran no muffler on his buell because he liked the sound lasted one summer,start of this year it jetisoned rear piston, tried to warn him

It was either unrelated or most likely wasn't tuned for the exhaust and running way lean. The rear cylinder runs hotter anyway and if you run a straight pipe without tuning it'll be extremely lean.

[wolfo68]

That's what my homemade pipe is effectively, Always remember to tune though. I had to tune it for the pistons and the exhaust.

[nobuell417]

I just bought my 08 xb12 a week ago. Other than the exhaust being "cored" as the seller put it. Its bone stock. I love the handling of the bike but miss the quick power off the line and/or on the strait away. I don't know where to start on fixing my dilemma.....exhaust, fuel module, what do I replaced first?

[wolfo68]

Air filter to start and tune

[Ghosted]

Straight Pipes FTMFW
http://www.buellxb.com/buell_images/16813_20130529015359_L.jpg

Talk about zombie thread...

[pm8675309]

While my muffler was a Drummer, I rode a little with headers, out. Terrible. No top end. Gotta have some back pressure or your top end dies.

[jetlee]

Gotta have some back pressure or your top end dies.
No. Just, no.

The 'backpressure' myth applies to low-end power anyways. It's the lack of scavaging that causes exhaust reversion and hurts the low-end output of the engine as a result of running too-large diameter header(s).

[snrusnak]

^ [up]

Why everyone give you crap jetlee? You post good info lol.

Smaller diameter exhaust tubing promotes higher exhaust gas velocity which gives more potential to build power. The key is smallest diameter pipe while moving enough volume. There is a bit of a trade off with low rpm and high rpm. Low rpm you want smaller diameter and high rpm you want larger diameter.

[jetlee]

Why everyone give you crap jetlee?
I ride a Blast.


You post good info lol.
Thanks!

[pm8675309]

AllI am saying is that while I rode, the top end took a ****. Maybe it is because the ECM was freaking out about the changes. The power loss at high end felt as though I was braking while at WOT.
Also, I don't believe in exhaust reversion. I believe god created all motorcycles in his vision, and when you take the muffler off, he punishes you by stealing your horsepower.

[jetlee]

All you said was, "Gotta have some back pressure or your top end dies." That is horribly incorrect information. Now you're relaying a story with a different (more correct) hypothesis.

Back pressure is bad. Period.

Make sure the pipe is long enough to not let the vacuum wave pull in cool outside air and warp your valve if it hits before the next exhaust pulse. Make sure the pipe is small enough to keep velocity up at low rpm but large enough to flow adequate volume at high rpm. For an XB12 that's around 1.75"-2" diameter and 1.5"-1.75" for an XB9, depending on your style of riding. If you stay in the lower revs and shift early then keep to the smaller pipe; if you rev it out and shift high then you'll appreciate the larger pipe more.

Stay away from stepped headers for anything other than a race bike.


Why everyone give you crap jetlee?
I can be "abrasive", lol

As abrasive as Jet can be, its only cause He loves and knows his blast like no other. I would become his best friend if I had a blast in need of help.

[pm8675309]

Just to let everyone know, jetlee is very smart. I am not smart. He is handsome, I am pug fugly. He can rep 400lbs, I max 134.

I'm just playing dude.

I appreicate your insight, just.....mellow out.

[jetlee]

I appreicate your insight, just.....mellow out.
You're welcome. I am.

[pm8675309]

"You're welcome", C'mon.

You derive your self worth through your perceived intellect. Come down off your pedastool and focus your efforts on connecting with people. Your insight would be far more effective if people weren't put-off by your pretentious tone.

[jetlee]

"You're welcome", C'mon.

You derive your self worth through your perceived intellect. Come down off your pedastool and focus your efforts on connecting with people. Your insight would be far more effective if people weren't put-off by your pretentious tone.
You said you appreciate my insight. That's akin to saying, "Thank you." I replied "You're welcome" as you're supposed to do when someone thanks you for something.

Regardless of my tone (tone in text?), my information is true and correct. Should I add pictures of daisies and fairies to my posts? Would that make my information easier to interpret and more friendly?

http://upload.wikimedia.org/wikipedia/commons/9/9b/Several_daisies_(Asteroideae)_top.jpg

http://www.wallsave.com/wallpapers/1600x1200/unicorns-and-fairies/697144/unicorns-and-fairies-susan-seddon-boulet-697144.jpg

Better?

[pm8675309]

In written composition, tone is often defined as what the author (rather than the reader) feels about the subject.

I already recommended what you should do to capture your audience; lose the pretentious attitude.

Save the flowers and fairies for the weekend.

[jetlee]

I sorry, Massa! I di'nt mean ta offen' ya, Massa! I so sor'y, Massa! Pleez don' beat me, Massa!

lmao

You seem more like a Disney person.

http://knoledge.org/fairies/wp-content/uploads/Wallpaper-Mushroom-Two-Piece.jpg

This could be why people don't like me. I try to be nice, then people push my buttons and I turn into an asshole. I don't care, **** off.

[pm8675309]

pm8675309 - 1. jetlee - 0.

The rules stipulate that the introduction of racial epithets result in automatic disqualification.

[jetlee]

http://ih1.redbubble.net/image.11907026.4950/flat,550x550,075,f.jpg

[pm8675309]

This could be why people don't like me. I try to be nice, then people push my buttons and I turn into an asshole. I don't care, **** off.

You are centered around yourself. Look what you wrote man: I, my buttons, I. You move through your life only considering the way you do things, the way people act towards you or the way things affect you.

I'm sure your perception indicates that everyone is an asshole. Try living outwardly. Empathy is a powerful consideration.

[jetlee]

http://t.qkme.me/3qsbay.jpg

http://images.sodahead.com/polls/000662593/polls_Want_A_Cookie_2439_236871_poll_xlarge.jpeg

[pm8675309]

Just offering some insight, just as you did.

I'm just trying the be nice but everyone is an asshole. Haha

[jetlee]

http://www.troll.me/images/kanye-west/yo-imma-let-you-finish-but-that-last-meme-post-was-the-best-meme-of-all-time.jpg

[pm8675309]

This has been far more entertaining than my cubicle. I'll stop flexing my internet muscles now. What's your address? I'll mail you a beer.

[30K09XB12R]

I ran my 09 xb12r with a 3" to 2" reducer tip with 1/2" internal cross V welded in. When i tried the header completely open it wouldn't rev or idle rite (100% oem bike). Sounded like a beast though. Even with the little bit of back pressure from my self designed tip, there was definitely a loss in power from OEM settings. Bike also ran HOT. 31k on the bike now an i installed factory exhaust with interactive valve held open for Jennings GP race track to stay within sound DBs. It was nice to have a quiet (for me) bike with all Factory HP an TQ back. bike ran cooler too even with hitting 6-7grand every mile (thats every 47.5 seconds, tracks 2 miles long).

[ztied]

I agree with jetlee,it seems everyone is focused on back pressure,becuase that is what we hear,so we assume the person we heard it from was right.I even said the same stuff before,but after educating my self,there is a lot more science to the exhaust then the back pressure.Dont know enough to argue it,but enough to not spread incorrect gossip.
I do appriciate jetlees info,and I want to learn more,so I can max out some ponies on my faithful stead.

[turbohearse]

Here's an old schoolers way of doing it. Paint a straight pipe white install the pipe on the bike run the bike till the paint burns off cut the exhaust where the paint stops burning to run straight pipes.

[wolfo68]

Here's an old schoolers way of doing it. Paint a straight pipe white install the pipe on the bike run the bike till the paint burns off cut the exhaust where the paint stops burning to run straight pipes.

Why?

[turbohearse]

It basicly shows you how long the exhaust travel is untill cool so you don't burn the exhaust valve out they did it on the old shovels and knuckle heads and old drag cars running open headers then do a turn out to the side of the car so you don't get to much exhaust fumes in the car.

[jscmoto46]

[up]

[K_twitch]

hey guys, i literally just joined to add my 2 cents haha. when i was 18 i got my first bike, an 03 XB9S, i love it, I've had it for 4 years now. I've recently been having trouble with the jardine muffler that came on it when i got, the rivets on the end kept rattling loose and every time i re-rivet it, it comes apart again, im currently a full time student at Lincoln tech for diesel so i have no money for a new muffler so i made a straight pipe for it. i made it as long as the jardine muffler with a 45 degree out the side. it had no power when i tried it out. so with some redneck engineering i crimped the end of the pipe with a vice and it works perfectly. sound awesome too!

[jetlee]

Here's an old schoolers way of doing it. Paint a straight pipe white install the pipe on the bike run the bike till the paint burns off cut the exhaust where the paint stops burning to run straight pipes.
No.

If you're running rich, your exhaust is cooler than if you're lean. This will change where the paint stops burning off.

You also notice that Harley has this horrible reputation of being unreliable. Don't you think your method might have something to do with that?

[Danicles]

I have a question. I bought a 2009 fire bolt with a jardean exhaust, and a stock ECM. It sure was dead under 3000rpm. It just stumbled and didn't pick up well, you had to eas the throttle though the low rpm. I put a EBR ECM for that pipe in it and it helped a bit. Just bought another 2009 Ulyesses and it has stock exhaust. Great power and torque in the low RPMs, not as cool of sound, but it's not my hot rod of the two. Do they have different cams between the two models? Or is it the variable exhaust valve that buell has that gives you more back pressure at low rpm and opens up more at high revs? My 98 1200xls straight piped, has tons of torque from a 1000 up! I think it's all computer, cams and exaust. A straight pipe would be awesome on the fire bolt, but to much time involved to tune it right, did a lot of reading on it and it's not worth my time anyways. 90ci kit is the way to go!

[theMelvster6]

Cams are the same grind for all xb models. The difference in cams for the 08+ Xb's is they have longer shafts and drive the integrated oil pump on cam cover. Also the stock 12 exhaust does have an exhaust valve to help with low end torque. Whenever you remove it and run an aftermarket pipe the trade off is typically less bottom end for more top end. The only real cure is a tune specifically for your bike. Even the EBR ecm tunes for specific pipes are still pretty generic.

[fglackin]

Anyone know anybody around horsham Pennsylvania I can take my 2005 xb12 to for a tuning problems?