White Brothers XCR Exhaust Review at KLRWorld.com

[Hondo]

As far as being loud, keeping the rpms down as you leave the neighborhood is all ya gotta do-

[musclefixer]

That's what I'm talking about...
 

[SDKLR650]

whats up fellas new to this forum but been lurking for a while,just want to give my 2 cents here i just purchased the XCR and installed it last week and it looks and sounds mean!!!!!i yoused to have the SUPERCRAP till i finally gave up with it after the end cap vanished,anyways the main thing i have noticed is the xcr does not get roasting hot like the supercrap did,and it sounds much cleaner.And with the spark arester out it thumps hard

[Hondo]

  SDKLR650 !

It is a great feature that the exhaust outer shell does not get hot. In fact I would have no issue at all with luggage resting on it.

[motorider]

I just put my E2 on today and installed a UNI air filter.  It is allot louder.  I have not got to go ride it yet and feel the diffrence yet though.  I have not done any carb work yet either, a little hesitant, but I am sure I will do the .22 or a jet kit.  It seems to backfire/pop when revved quickly now and sometimes bogs when the throttle is rolled on fast, any suggestions?

[high-side]

I just put my E2 on today and installed a UNI air filter.  It is allot louder.  I have not got to go ride it yet and feel the diffrence yet though.  I have not done any carb work yet either, a little hesitant, but I am sure I will do the .22 or a jet kit.  It seems to backfire/pop when revved quickly now and sometimes bogs when the throttle is rolled on fast, any suggestions?

The bike is lean from the factory, the E2 just made it even leaner and the result is poping,boging, and probly a pretty nasty surge around 4000 RPM. My experiance with my 08 is that with only the air box snorlke removed, the 22 cent mod is good. If you do the L mod or a exhaust, the 22 cent mod is'nt enough. If you do both you are gunna be way lean. I removed the air box snorkle, did the L mod and installed the E2, next I'll be installing a dynojet jet kit. It's cheaper to use a KLX needle and buy the jets, but for me the dynojet kit should take some of the trial and error out of dialling it in, worth the money to me.

Sometimes I get off track a little, you just need to richin her up some. Once the jetting is good, with that pipe she'll rip.
 

[braindead0]

As far as being loud, keeping the rpms down as you leave the neighborhood is all ya gotta do-

Got mine last week.. it's still a bit loud.. but nowhere near as bad as the ricer cars, hardleys, rolling boom boxes..etc..  It sure does sound nice!

[Hondo]

I is louder than stock, that's for sure.

It's by no means obnoxious, and during exrended rides I wear earplugs which make the sound output no issue for me.

[braindead0]

I is louder than stock, that's for sure.

It's by no means obnoxious, and during exrended rides I wear earplugs which make the sound output no issue for me.

Actually met a guy at the local Lowes around lunch, he has an 05 if I remember correctly. We were chatting while my bike was idling without any problem. 

It is really sensitive to throttle though, you can be quiet with a very very gentle hand.. twist the loud handle too much and it barks very nicely. 

I was also amazed at how far the exhaust pulses go, darned things is like one of them 'air blasters' of years gone by.

[Hondo]

Yep, it breathes like an elephant now-

[musclefixer]

You think it's loud now, try taking the spark arrestor out of it!
When mine fell out, and I had to go pick up another one, people on the fwy were looking at me rough as I passed them! 
The thing pulls harder above 5k though. 

[20 klr 08]

I'm don't know about the sound testing, but I do know this.  I live around allot of old people here, and they complain about allot of thing. Every one of them will call the cop if someone drives around here with there music thumping.  Not once has any of them ever complain about my E2, and I drive around allot with my little girl.

This deal about the stock exhaust being the best exhaust for the KLR.   I have to put my 2 cent in on this.  I feel that this is wrong.  I didn't need Hondo's dino test to show me the better performance, I could feel it. But the dino dose prove that it dose increase the HP. And thank you Hondo for all the work you did on that.  I put my stock exhaust back on one time to see if there was a MPG change. It felt like I was riding a 50cc. There was no change in MPG.  Those that like the stock exhaust are more interested in quite then performance. Fare as I'm concern the stock exhaust is junk.

OK I'm done.  You can all bash me now 

Hey DragoSapien, Did you just put the pipe on or have you done other mods. My XCR should be here this week. I'm gonna start with just the pipe.

[braindead0]

Hey DragoSapien, Did you just put the pipe on or have you done other mods. My XCR should be here this week. I'm gonna start with just the pipe.

I'd recommend the 22 cent mod, in theory the new pipe doesn't require any jetting changes, BUT... I've never seen a bike post 80's that wasn't jetted lean from the factory to make it past emissions testing.  I haven't seen one that doesn't benefit from a shim or two on the stock needle and a bit of adjustment on the pilot screw.

[20 klr 08]

The .22 will more than likley be mod #2. It seems the epa has long reaching arms. One thing at a time on this bike, just to see the difference. I'm not sure I want to cut on the airbox either,maybe just pull the snorkle. We'll see.

[braindead0]

The .22 will more than likley be mod #2. It seems the epa has long reaching arms. One thing at a time on this bike, just to see the difference. I'm not sure I want to cut on the airbox either,maybe just pull the snorkle. We'll see.

The .22 mod doesn't require cutting into the airbox.  I'd avoid the airbox cutting bit, unless you want to start playing with main jets.

[high-side]

If you want to do the L mod skip the .22 cent mod and replace the stock needle with the KLX needle from schnitz racing. I feel this is the best setup by far. The .22 cent mod is good, but if thats what you choose I'd leave the airbox alone except for the snorkel.

My current setup on my 08 is the L mod/snorkel removed, fuel screw 2 3/4 turns out, KLX needle, clip in the 3rd position and stock jets. This is the smooooothest and strongest it's run by far and even sounds better.
I allmost forgot, I'm running a E2 pipe
Hope this info helps.   

[musclefixer]

So you didn't do anything to the jets then???
I was waiting for you to tell me the hot set up, since we are about the same setup so far....
At least until I get my Pelican cases!!! 

[high-side]

I didn't touch the jets. The 08 has a smaller main than the pre 08 and it seems to be spot on. After the holidays I'm gunna fine tune it on a dyno, I won't be surprised if I don't have to change anything though.
 

[Hondo]

If you guys look at the review, take a close look at the dyno chart comparing the dialed in baseline vs the E2 or XCR.

The aftermarket exhaust required increased main jetting for me just by adding the exhaust.

Even though I did begin with a lot of mods, I did establish a baseline with the air/fuel ratio close to the optimum. By adding the E2 & XCR it leaned the system out more.

A stock bike might see less of this effect, but the the amount that these new systems lean out the air/fuel ratio should be the same.

So ride your bike for a bit and then check the color of your spark plug- if it's white, it's lean and you will need to up the jetting.

[musclefixer]

Seriously, if the bike is a tad lean, I probably wouldn't even have to check the plug.  The bike is pretty touchy on the air/fuel ratio.  I installed the UNI and removed the screen, and got a lean surging at 43-4800 while of the freeway.  I covered up the small hole I left in the airbox, so just left the snorkle out and the surge went away.
Now, if the thing is still on the ragged edge of lean, then a plug "check" will tell me that I suppose.
All I know is that I'm riding the snot out of it and still getting about 48 mpg! 
Hondo, I know your at a higher altitude as well, so that might require some compensation for air density, right?

[Hondo]

Opening up the L-Mod & using a 150 jet might make it run better, but YMMV.

[Zeph]

I live at sea level and have fitted a White Brothers exhaust. The final jetting I ended up with is the KLX needle and shim set on second slot from the top, a 145 main, a 42 pilot and the pilot air screw out two turns. The air box has the snorkel removed, the wire gauze still in place and five 25mm diam holes in the top of the air box.
The bike needs the choke to start and run for about a minute and then it will just idle at just over a 1000 revs which finally settles at about 1400 once the bike has warmed up.
The performance is perfect across the whole throttle range.
I had previously installed a 150 main, needle on third slot from the top, air screw at 2 3/4 turns out. This set up ran fine but needed no choke and only gave 11 miles per litre. The new set up gives 13.5 miles per litre. That's  a change in your USA figures of 41mpg to 51mpg. I think it's 3.8 litres per US gallon??
In UK figures that's 50 mpg to 61 mpg.
The bike is a real treat to ride and sounds great.

[Hondo]

cool Zeph-