Its between the Akro hex and the R55 full systems. Ive read every single thread on both exhausts and i still cant make up my mind. I havent heard one bad thing about each one. Its for my k8 gsxr600 btw. Heres my take on the two exhausts and my approach towards choosing between the two:
Akro Pros:
- Pricy but worth it due to looks
- performance
- very light
- eliminates cat (goes with looks) Akro Cons:
- Pricy lol
- not a big akro fan
- haven't heard the sound of one (i like my sound deep, loud, and lots of bass)
R55 Pros:
- approx $100 less than Akro
- like the fact that suzuki and yoshimura work in unison
- like the look
R55 Cons:
- dont know the performance
- dont know the weight (between akro which is lighter?)
- again havent heard the sound of one
as you can see its more of my ego peformance i am worried about. Im not too picky on the price, i like the high performance with the loud sound...which one should it be??
you said you're looking for a deeper sound.... that's Akra all the way
also they offer titanium full systems, not sure if yoshi does or not for the 08's yet...
you does offer full titanium systems. They just are not as popular for them, but they do offer them for most all bikes. You can search yoshimura-rd.com to see.
Yosh and Akra are both high quality systems for sure...you can't go very wrong with either of them.
you does offer full titanium systems. They just are not as popular for them, but they do offer them for most all bikes. You can search yoshimura-rd.com to see.
Yosh and Akra are both high quality systems for sure...you can't go very wrong with either of them.
apprieciate the replies guys. hey motomummy do you guys ship to toronto canada?
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Join Date: Aug 2008
Location: NORCAL
Motorcycle: '08 GSX-R600(STOLEN)
Posts: 1,995
Re: Akro or R55 full system?
there pretty close in power gains, so it is pretty much down to which one looks the best you, Im buying the akra system in a few months once i have enough money, I like the way the akra's look over the yoshi's
explain why yoshimura is trailing behind akrapovic?
gsxrodriguez, they're both great exhaust systems. i think it boils down to what is more of an eye candy for you. i had to make the same decision, i went with yoshimura because i've had nothing but great experience with them, both on and off-road.
gsxrodriguez I've got the same problem, I cannot really make my mind which one of these two.
I assume both full systems Akrapovic Racing2 and Yoshimura R-55 have pretty close performance, one cannot expect extraordinary difference between these two constructions. But still I'm surprised why Yoshimura USA dosn't post any dyno charts on their site... Yoshimura Japan posts even slip-on charts. Akrapovic on the other hand promises extra 5.8rwhp. Yoshimura features "stylish Moto GP shorty canister" and "great power gains"
"The only spot it rubs is the that one little spot in the pic. If there was another 1/8" of clearance it would clear. I'm just going to live with it; it doesn't seem to hurt anything.
The Akra stuff is built to some pretty close tolerances (1/8" of clearance around the oil pan) and I may be able to move or shim the mount just enough to clear the fairing. I just haven't tried that hard yet."
At the other hand R-55 has a prefect fitment (at least noone on this forum reported problems).
I wonder about R-55 is "twisted" part after the center can. It looks cool but in my opinion Yoshimura wanted to maintain the original exhaust lenght. So it removes the cat and gives nice looks and probably enhances stock exhaust characteristic. Does the shorter lengh of Akrapovic influence performance/engine characteristic? I don't know but marketing guys form Akra on their webside promised power gains and Yoshi don't prove it on charts.
So as you can see a little bit - but just a tiny little bit - I'm favoring full Akrapovic vs full R-55. "Stealth" tidy look (my bike is black) and because shorter construction - maybe less weight.
Correct me if I'm wrong those are just my thoughts not science
PrePharm, I think your right, it pretty much is eye candy. i guess i was leaning a bit to the akro since it proves its performance and looks light by its construction, but the r55 looks just as sexy and by what everybody else is saying that it has just the same performance as the akro.
modificator, lol you and i are on the same boat and what you were telling me is the exact same thing that was on my mind. i know theres no charts saying what the performance is like with the r55, though there should be one because
a) k8 600's have been out for a while now and with yosh's reputation you wouldve thought that they would have tested it on the bike already and
b) the amount of people putting on a full r55, you would have expected at least one person to put up a chart or at least say how the performance is via their power commander which should obviously be installed with their full system
but nonetheless im beginning to think that the r55 will be for me since i like to keep things genuine, although yoshimura is a third party they work in unison with suzuki, and i like the design of the r55. it does suck that the r55 is not full carbon like the akro but it doesnt matter since i have the yellow 600. the akro would be perfect for you modificator since you have the all black, but it pretty much is down to the looks
No doubt that TRI-OVAL RACING TITANIUM EXHAUST SYSTEM is the best aviable choice for our rides. If I had enough money i would go for it, but right now its Japan Yoshi price that kills me... In Europe the price starts from 2.170 Euro , so its about 3020$ Out of question... I'll stick with Akrapovic/Yoshimura R-55...
modifier: what makes that better then say a full akra or yosh titanium exhaust? Because it costs more? It costs more because they are a MUCH smaller company then yosh America. They are not junk, but I wouldn't say they are that much better then the other top of the line titanium systems.
In many industries and this one also some manufacturers inflate the prices to get people to think they are "better" and often times it does work. I'm not saying this is the case this time, but it does happen at times in every industry.
We can sell them as well so I'm not stating this from a bias standpoint. I will say they are the most unique and the finish of them is the best i've seen compared to any other exhaust, but performance wise I wouldn't say they are better then others, they are way up there with others though.
http://www.yoshimura-jp.com/en/index.html is what they are talking about. Great finish and probably the best ever, you pay for it though. I can honestly say the attention to detail is the best i've ever seen, but as for performance it's on par with others out there that are also at the top of the exhaust game such as akra, leo vinci, yosh usa, etc...
A bit off-topic question to Mummy regarding Bazzaz Z-AFM wideband O2 sensor and R-55/Racing2:
Does the wideband sensor fit the original bung in any of those exhaust systems ?
I'm defenitely sure I want to go with Bazzaz Z-AFM but I prefer I wouldn't have to fabricate exhaust's original bung. Thats a very important feature of those exhausts that could help me make my mind
Here I found this feature: "Reduction nut for both sensor sizes". In Your 2007 GSXR 1000 with Akrapovic it didn't fit though. I know this is completly another exhaust but still its Akrapovic and that worries me a bit. Maybe they did a leap forward in bung technology now ?
call yoshimura and ask if it's the larger or smaller of the bung sizes. There are two of them and the Bazzaz uses the larger size. It's honestly not a big deal if you have to send your midpipe to bazzaz or yoshimura to hav ethem put another bung in it. We did it and it works great. Only takes them one day to do it then ship it back. I see you're in europe though. If you ordered through us we could check it for you and have it welded in for you if you need that done, then ship it to you.
, so its about 3020$ 
Out of question... I'll stick with Akrapovic/Yoshimura R-55...
now ?
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