Akrapovic - only +2.8 bhp & +5.1 bhp

It's not so much the out-right power gains you get from a system, look at how it moves the entire power curve to the right. This means more midrange which is a good thing! Not to mention better throttle response, oh lest we not forget the sound - mmmmm delicious.... Plus you're assured to save a few pounds which helps to offset the weight of those fat girls some of you have been pulling around on the back of your bike (you know who you are).

Yes, gone are the good old days when adding a system not only saved you a LOT of weight but also garnered you a LOT of power, but that's a good thing because that means your motors come in a higher state of tune that ever before WOW another good thing! This is too much for me....must go WHEELIE AHAHAHAHHAH!!!!

Chaos, panic, disorder......

my work here is done

from the Acra website:


POWER

With the Akrapovic SLIP-ON system you will not be getting just a visual enhancement of the motorcycle. Our system also increases the engine's power output throughout the entire rpm range. The growth is especially noticeable in the middle of the range from 5000 to 8600 rpm. It again increases at the upper end of the range from 12000 rpm right up to the redline, since the stock power starts to fade at 12400, while our system keeps pulling to nearly 14000 rpm, where max. increased power reaches 7.6 HP.

TORQUE

The torque also gets a boost with the installation of an Akrapovic SLIP-ON system. Torque is increased throughout the entire rpm range. The engine has a characteristic drop-out at 5600 rpm which is still visible with our system, although to a much lesser extent than with the stock system. However, the Akrapovic system totally levels the drop-out at 7800 rpm, which is right in the middle, most useful part of the rpm range. The increase of torque throughout the rpm range and the widening of the torque band offer the rider the ability to shift more smoothly without having to push into the higher end of the rpm range.

POWER

The character and purpose of the EVOLUTION exhaust system are clearly evident from the power curve. Linear acceleration and a major increase in power over the stock curve are the outstanding results of the excellent construction of our exhaust system. The slightly lower output at the low end of the rpm range, which is more or less not functional in racing conditions, is negligible, while from 5400 rpm upwards, the power curve only grows in comparison to the stock curve. The explosion of power from 12400 rpm on is particularly awesome, and where the stock exhaust starts to drop off, with our system the engine keeps pulling to nearly 14000 rpm, with the rear wheel receiving 110HP. Very suitable for racing. Max increased power at 13900 rpm is 14.9 HP.

TORQUE

The torque curve is suited to a racing style of riding in the same way as the power curve. Lower performance at the low end, explosive performance right in the range that you need it most. A strong increase can be seen from 5200 rpm all the way to the very top of the rpm range. With an Akrapovic exhaust system, you get torque right where you need it when you’re out on the track.


2003 green 636

MY HOME PAGE http://emile.bikepower.nl

He posted the ZX6RR evolution / racing system notes... here's the ZX6R evolution / racing system notes:

KAWASAKI ZX 6 R 636 (2003) AKRAPOVIC RACING & EVOLUTION LINE

The other half of this year’s ZX 6. Only the engine of the Kawasaki ZX 6 R is different from the ZX 6 RR. The R version has a larger engine displacement from last year’s model and unlike the 6 RR does not fall into the WSS class. In other words, this is a bike with a lot of technical achievements which are very welcome among motorcycle riders. The Kawasaki ZX 6 R is a fantastic 600 class machine.

GOAL

Those who choose the R version of this year's Kawasakis will not have to do without an Akrapovic component. On the basis of our experience working with the Kawasaki factory racing team, we have developed complete Akrapovic RACING and EVOLUTION exhaust systems for the ZX 6 R. You too will be the happy recipient of a few extra horsepower.

ABOUT AKRAPOVIC RACING & EVOLUTION SYSTEMS

The Akrapovic RACING and EVOLUTION systems for the ZX 6 R are 4-2-1 configured. Of all these pipes, unfortunately only the “1” will be visible, i.e. the link pipe and the muffler, while the rest will be covered by the striking cowling of the new 6. Both systems are composed of conical elements, which is a standard characteristic of our top exhaust systems. The RACING system is constructed of high-quality stainless steel, while the EVOLUTION uses exotic titanium.

Both systems offer the particular satisfaction of the filigree welds, which are also one of our house specialties. Of course these welds are used only to join the conical elements, while the individual parts, i.e. the header tubes, collector, link pipe and muffler are held together using free-floating connections which are fastened using high-quality silicon-shielded tensioning springs.

The results of prototype testing of both systems have shown that the power curve is improved with the addition of interference crossover tubes. Therefore both systems come with these tubes installed.

NOTE:
Only the EVOLUTION model exhaust system includes a fitting for installing a lambda sensor.

NOTE:
The Racing system is available with an optional titanium link pipe.

Looking at the back end of the system, we can see that the muffler is the familiar Akrapovic oval section. The system uses the stock chassis hanging bracket, which is used to attach the famous Akrapovic carbon-fiber clamp. With this configuration the passenger footrests can still be used.

NOTE:
When mounting the carbon-fiber clamp onto the stock chassis hanging bracket, bear in mind the correct orientation (right offset) of the clamp viewed from the rear. SEE INSTRUCTIONS!

Both the RACING and EVOLUTION systems can be ordered with an optional carbon-fiber hanging bracket which replaces the stock bracket. The carbon-fiber bracket guarantees maximum compactness and also lighter weight. The muffler is mounted in a slightly higher position.

NOTE:
When using the carbon-fiber hanging bracket the passenger footrests cannot be used. The carbon-fiber clamp is installed in the opposite direction – left offset when viewed from the rear. SEE INSTRUCTIONS!

Before purchasing an exhaust system, take some time to decide which type of muffler outer sleeve you would prefer: carbon-fiber, with the racing look of its black checkered pattern, or titanium with its refined satin sheen. The performance and sound are the same in both cases; the only difference is the aesthetic effect.

Measurements of the Akrapovic RACING system on the Kawasaki ZX 6 R:

POWER

More power at the top of the rpm range is the identifying characteristic of the Akrapovic Racing and Evolution exhaust systems, and this Kawasaki is no exception. The boost in power begins only at 9000 rpm and runs into the overrev range. 111.8 HP at 12950 rpm is the measured max. horsepower on the rear wheel, i.e. 4.1 HP more than the stock system, but that’s not the maximum increase, which is a further 1 HP. Up to 9000 rpm there is no great difference in power using the Akrapovic system.

TORQUE

The racing nature of the Akrapovic exhaust systems for the Kawasaki ZX 6R 636 is also reflected in the torque curve. Once again the increase is only apparent from 9000 rpm onwards, where together with the power curve it follows the commands of the rider.

Another parameter which characterizes our exhaust systems is lower weight. With the Racing exhaust system you will save 4.18 kg, and even more with the Evolution system. Whichever you choose, this savings is exceptionally welcome!

By choosing an Akrapovic exhaust system you give your bike a bit of true racing spirit. The deep, piercing sound and the recognizable red scorpion on the logo will only be further proof of this.

"Keep yer feet on the pegs and your right hand cranked."