do I really need another one in the garage? LOL!

We'll I spoke too soon about being done with full systems, apparently they're not done with me! I just confirmed I have an exhaust leak on the CBR. As you guys remember when I installed it almost a year ago I kept getting lift throttle afterfire from the exhaust on upshifts and no mapping change would make it go away. I suspected an exhaust leak since the Yoshimura was an absolutely awful fit, nothing lined up but it's hard to tell if it's leaking until you get some telltale carbon residue build up around the exhaust port. Well, I've got almost three thousand miles on it since the install and there is now ample evidence that #2 is leaking pretty bad on the bottom side #2 cylinder, the gasket appears to be smoked and the hot gasses are burning the head around the exhaust port. This will be the third time I have had this system off trying to fix the bloody exhaust leaks, it just won't line up. I'm considering junking the entire pipe and ordering an Akra before I destroy a cylinder. I doubt Yoshimura will fix it since it's been almost a year since installing this junk. Yoshi, you got the last dollar from me you're going to get......

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I'm considering junking the entire pipe and ordering an Akra before I destroy a cylinder.

That sounds like the only way to go. Is there another system that you might like? It's always nice to try different stuff. However, if you are convinced that you know the best, trying something else is almost always a disappointment....like ordering something new from your fav eatery where you always order the same dish.

Yoshi, you got the last dollar from me you're going to get......

It really sucks to spend a bunch of money on something hat is so important and have it not work properly. Thanks for the tip. Amazing since the Yoshi slipons were so popular for busa and 14s. I wonder how many other pipes have a bad rep for fit? HUH- I didn't even think much about that when i ordered my Tsukigi. The supplier mentioned that the fit was superb. I always assumed that meant that the segments fit well-- it never occurred to me that a manufacturer would be so irresponsible to make something that did not match up to the motor it was designed for. That should be a given and if the system is quality, the pieces should mate up well to one another too.

* Last updated by: Rook on 7/11/2010 @ 11:39 AM *

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Rook, if you can find my installation thread on this system back in July of 2009, I was going crazy trying to get it to line up. Two of the four headers would align so-so but the third and fourth would not point in the same direction, i.e collector would not slip on. #1 and #2 were the most problematic. I removed the system and installed fresh gaskets and tried again and thought I had it licked, we used lots of force to move the wayward headers where they were supposed to be but continuous afterfire has occurred ever since at high rpm. The fit on this thing was atrocious from the get go and from what I learned on the Fireblade Forum I wasn't the first to get stuck with one of these. One guy sent his back and Yoshi wrecked it trying to get it to fit back into the jig. They shipped him a complete new system which actually fit decent, must have been hand picked..LOL!

I'm going to contact Yoshi, explain the situation and see if they will make good on it. This is exceedingly bad PR when your aftermarket stuff is damaging brand new motorcycles.

Yoshi slipons work great, there's almost nothing that can get out of alignment, just an endcan and a link pipe. I have a set on my 14 and other than the fact that the baffles rattle around inside the cans like a tin can full of marbles it works great.

If Yoshi won't help me out on this, Plan B is to install the stock headers back on, which fit perfect and add an Akra slipon, I'm tired of fooling with this thing.

Disgruntled in
Dallas

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I remember a couple threads about your exhaust install on the CBR. It's understandable that you'd be POed over this but don't act in haste about solving the problem. You have to admit, there have been a lot of guys with far less mechanical knowhow than you and they got full systems on with just a couple questions to ask. PCs are usually not a huge hassle either. None of that stuff is an afternoon job but I don't hear of people having trouble. When it's done it's done and everything is fine as long as a good map is/was available. I do not have the AKra/CBR dyno graphs committed to memory but for a bottom end oriented bike, a slipon is probably not a bad idea in terms of performance. Just make sure it's what you want. If you still like the full system, do some research on Akra full systems and see how many reports of fitment trouble you come across. Seems to have worked out well for you on the ZX-10 install.

* Last updated by: Rook on 7/11/2010 @ 5:43 PM *

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I'm not acting in haste but I'm a realist Rook. I could take the Yoshi system off and put it back on a thousand times with new exhaust gaskets and it's going to still leak, #1 and #2 header flanges are not true with the exhaust port faces. It can't be fixed without cutting it apart and rewelding. I doubt Yoshimura is going to fix it now but I'll try. Akrapovic fit nearly perfect, you get what you pay for. I'll probably get an Akra for the CBR, better performance I hear anyway. I'll have to just write this one off as an expensive mistake. I talked to the Service Manager at the local Honda dealer and he told me aftermarket system fit runs the gamut from good to atrocious. I guess I got an atrocious one....LOL!

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This might sound like a hairbrain scheme but would it be worth trying some kind of thicker gasket material to make up the leak space? Maybe two sets of gaskets? I don't know that I would want to try that after all you have already gone through. If I took that header off again, did a patch job and it was no better or god forbid, worse or if it didn't last, I think I'd have an anger induced anurism right on the spot. I would just want something that works as it should.

* Last updated by: Rook on 7/12/2010 @ 6:33 PM *

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Kruz,
If you dump your exhaust, look at a Sato or Arata Slip-On. A full Akra will only yield you better results at the upper limits. And that will only be 1 or 2 HP, depending on your mods. The Arata or Sato SO will actually best the full system all the way up to 10,000rpms. In my case I ran an '06 1000RR, Arata,PC3,HRC intake,BMC race,custom mapped 160HP,84TQ. Check it out. All the info is available in the 1000RR forums. I've seen you post b4, so i know your at the right place!

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This might sound like a hairbrain scheme but would it be worth trying some kind of thicker gasket material to make up the leak space? Maybe two sets of gaskets? I don't know that I would want to try that after all you have already gone through. If I took that header off again, did a patch job and it was no better or god forbid, worse or if it didn't last, I think I'd have an anger induced anurism right on the spot. I would just want something that works as it should.

No way Rook, you should never have to rig something like this to make it work. It's the manufacturer's job to make sure the pipe fits right from the start. I know cause I used to build 'em. My first job before heading off for college was working for a company down in Houston called Jemco. We built motorcycle exhaust systems from scratch, header systems for four strokes and expansion chambers for the two smokers. I had a couple of pipes come back to me in the three years I worked as a welder for those guys. You would lay it back in the jig and sure enough something had moved around, probably when she was cooling down after final welding. We'd have to cut off the brackets, realign in the jig and reweld it, stuff happens.

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Hey Cutback, I tried to buy a Sato Racing or Arata full system a year ago and couldn't find them anywhere for the 2007 CBR 1000RR. My understanding is they were sold out and out of production for this machine.Do you know where I can find them in full system or slipon configuration?

BTW, I just sent pictures to Yoshimura Warranty Claims, they may take it back to find out what's wrong with it. I'm gun shy now though, if it doesn't fit perfect, I'm not putting it back on.

* Last updated by: Kruz on 7/13/2010 @ 12:59 PM *

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I just posted at 1000RR.net on the Arata and got an earful, especially on poor customer support from ArataUsa. It sounds like they may be going under from the looks of things...I'll pass.

http://www.1000rr.net/forums/showthread.php?t=77449

Sato is completely unavailable in this country for the '07s.

That leads me back to Akrapovic cause the best pipe in the world is useless if I can't buy one. I'm looking hard at the Akra slipon, low to midrange looks great, topend so-so and I know the stock header fits.

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Kruz,
Call Brad or Mary @SuperbikeSupply. They will hook you up. I have never heard of an issue with an Arata on '06-'07 1000RR. They had been the (sh*t) since '04 on this bike. I dunno. Maybe something has changed with them. Brad will know and steer you correctly.
After reading your thread, you can see clearly, just don't go direct with Arata. All the advice you were given is sound. LDH(Sato) knows this bike inside out. He was working for Dan Kyle, Kyle Racing USA. Shocker too.(Arata) I would dog the classified section on the forum and pick up a clean one. Good luck with your exhaust hunt!

* Last updated by: Cutback on 7/13/2010 @ 6:12 PM *

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Cutback, I contacted Superbike Supply and they no longer carry either Sato or Arata systems. I just ordered an Akrapovic Carbon Fiber slipon exhaust for the CBR from MorePower Racing. I'll bolt the stock header back on and should be good to go as long as the leak has not damaged the exhaust port flange. The power charactistics of the slipon are way better than the RS-5 full system down low and in the midrange and the part throttle response should be improved greatly as well.

BTW, no response from Yoshimura on whether they are going to take my RS-5 back and figure out why it doesn't fit. I sent them pictures of the problem yesterday at lunch.

* Last updated by: Kruz on 7/14/2010 @ 11:47 AM *

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You cant't go wrong with your choice. You will like the fit of the oem header and the low and midrange power improvement, crisp throttle response and better fitment. On the street this is the best all around set-up as you use this range most often. A properly modded bike with full system and custom tune is a total rush but, we don't very often get to go WFO/OTG at the top end of the scale on the street. If you change your mind, you can always add an Arrow header. Good luck with your Yosh.
BTW, Are you still luvin' your 6? I absolutely love mine. The funnest bike I have ever owned. Simply amazing!

* Last updated by: Cutback on 7/14/2010 @ 7:40 PM *

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Cutback do you have an '09? The '09's are having a problem with surging throttle, I thought I was OK but it started on mine at around 500 miles and last night it felt like it was running out of fuel in gears 1 through 3 between 8 and 10,000 rpm. There are threads on this at the ZX-6R forum, it's widespread and no answers from KHI yet. I am going to contact the NHTSB and file a complaint as it is a safety issue, I was unable to accelerate for several seconds, just completely dead throttle repsonse.

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Kruz,
Yep, mine is an '09. I posted a thread called "New Toy" and pic in the (Pictures) area of this Forum. I'm well aware of this gremlin as I belong to the ZX-6R Forum also. Personally, I haven't experienced this gremlin. I do have a tre on the bike and it has it's greatest effect in gears 1-3. I know of guys posting,(that were experiencing this issue), that after installing their tre, the problem still persisted. Obviously, having your throttle go completely dead at the wrong time could get you completely dead!!! Man, good luck resolving that issue. At least you have other horses in the stable to saddle.

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Yesterday evening I switched gas stations on a hunch. I'd been going to one of those mom and pop stations for the last couple times I filled up the 6R. I topped off at one of those new high volume stations last night and the bike ran perfect. I'm not going to say it was a case of bad fuel just yet until I get some more miles on it but I'm going to keep my fingers crossed that's all that it was. Hopefully I dodged the gremlin. What did the TRE do for you, is that one of Ivan's jobbies?

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What am I missing here ? Gremlins ? Which bike ?

Kruz,
I have Healtech's Tre. Check out their site as they do an excellent job of descibing, what ,where and how. With their tre, you still retain use of your gear indicator. With Ivan's you don't.(unless he has changed it.) I do believe he is still the originator of the device. I use his tre on my 14. Works as advertised! Perfect.

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What am I missing here ? Gremlins ? Which bike ?

2009 Zx-6Rs Romans, There are reports on some of the 6r forums talking about surging at steady throttle betwen 8,000 and 10,000 rpm. I thought I had the issue but it appears it may have been bad fuel, maybe these things are sensitive to octane because of the super high compression ratio and new combustion chamber design. since changing fueling stations, I haven't had a reoccurrence. I did put the Akra slipon on my 6R Saturday, runs, sounds and looks great and about 1/2 the weight of the stocker. This was exactly what my little 6R needed, it perked up the low end delivery to where I don't feel like a sitting duck coming off a stop light. I will post pics either later today or tomorrow, busy at work getting ready for my upcoming trip to Wisconsin.

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talking about surging at steady throttle betwen 8,000 and 10,000 rpm.

I will be watching for this now, thanks for info. I have had no such issue. Fingers Crossed.

I did put the Akra slipon on my 6R Saturday

Does the Link pipe come with the Akrapovic slip-on or is it a Extra ?

Romans,Akras on there....me like!

* Last updated by: Kruz on 7/19/2010 @ 11:21 AM *

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SHWEEET! I can see the can is a little shorter than the Zx-10's.

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Yes, slightly shorter than on the 10R, I think it compliments the looks of the 6 perfectly. Now for that pesky CBR, the Akra came in yesterday and I'm hoping I can have it on before I leave for Wisconsin.

I was comparing the dyno charts between the Akra slipon and the Yoshimura RS-5 full system and the Akra stomps all over it until past 9000 rpm. The full systems just don't make a lot of sense to me on the street, except for the one on the 10. That one actually improved low and midrange along with massive topend, wish they all were that good.

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I will be watching for this now, thanks for info. I have had no such issue. Fingers Crossed

If you already have a Power Commander on there Romans, you have no worries, the PCV fixes the problem.

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