Yoshimura RS4 Race Exhaust System Kawasaki Ninja 650R 2012-2016
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  • Yoshimura RS4 Race Exhaust System Kawasaki Ninja 650R 2012-2016 - Stainless Steel
  • Yoshimura RS4 Race Exhaust System Kawasaki Ninja 650R 2012-2016
  • Yoshimura RS4 Race Exhaust System Kawasaki Ninja 650R 2012-2016
  • Yoshimura RS4 Race Exhaust System Kawasaki Ninja 650R 2012-2016
  • Yoshimura RS4 Race Exhaust System Kawasaki Ninja 650R 2012-2016

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MSRP
$719.00
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$71.90
Price
$647.10

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Video Review

Yoshimura RS4 Race Exhaust System Kawasaki Ninja 650R 2012-2016 Videos

This product is legal in California only for racing vehicles which may never be used, registered or licensed for use upon a highway.

Yoshimura RS4 Race Exhaust System Kawasaki Ninja 650R

While the RS-4 Exhaust was debuted as Yoshimura's premier exhaust for off-road racing applications, R&D couldn't stop there. They have mated this sophisticated and stylish muffler to compliment the styling of the new bike. The RS-4 is pentagonal shaped muffler that features a carbon fiber cone end cap, two staged stepped baffle and striking good looks. The RS-4 muffler features a new front cap design that functions as a polyresonant chamber. thus creating a more quiet muffler with improved mid to top end power.

Along with improving sound and power, this system moves the muffler weight lower and closer to the bike for improved handling and weight distribution. Yoshimura continues to provide the best in performance exhaust systems.

Features:

  • Pentagonal-shaped sleeve
  • Front muffler cap functions as a polyresonant chamber which helps reduce noise
  • Two-stage stepped baffle
  • Carbon fiber end-cap
  • Stainless steel headers and mid-pipe (applicable models)
  • Made in the USA

Resources:

4.9 / 5
Bang For The Buck
4.8 / 5
Features
4.5 / 5
Style
5 / 5
Ease Of Install
4.6 / 5
Fit & Finish
4.5 / 5
Durability
4.9 / 5
This Product Fits:
Kawasaki
Ninja 650R 2012, 2013, 2014, 2015
Ninja 650R ABS 2013, 2014, 2015, 2016
Product Style RevZilla Item # Manufacturer Product # Availability
Stainless Steel / Full System 872184 146500D520/ In Stock: Ships within 24 hours

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4.9 / 5.0
17 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
16
1
0
0
0
Bang For The Buck
4.8 / 5
Features
4.5 / 5
Style
5.0 / 5
Ease Of Install
4.6 / 5
Fit & Finish
4.5 / 5
Durability
4.9 / 5
Bang For The Buck
5 / 5
excellent design
After an exhaustive search of every available system for this bike, I settled on the yoshimura and the final result exceeds my expectations.

In terms of design, they really nailed it. No other system (in my opinion) integrates so seamlessly into the unique styling nuances of the 2012-14 ninja 650.

The materials, fit, finish, and construction are all superb. The stock headers, mid pipe, and canister are garbage in comparison.

I verified with yoshimura (and received the comprehensive reply the same day) that this system is designed to run with the stock fuel settings. Dyno charts are on par with everyone else's...Arrow, Remus, and Akrapovic are the other systems that received my most serious consideration.

Installation was painless - aided by the precision design.

Didn't even try it with the db killer in, that went straight into the garbage. Almost a shame because that too is beautiful. CNC machined aluminum with a stainless tube.

End result, night and day. Loud. But crisp and clean. I'd describe the sound as similar to a smaller cc ducati with an aftermarket exhaust, but cleaner and more crisp. Pleasantly loud with the typical twin boom-boom. Night and day improvement to throttle response. Less abrupt engine braking upon decel. And the fueling is spot on.

Agree or disagree...I don't care. But that is my educated opinion. I don't usually write reviews, but there isn't much good information written about this system on this bike, so I'm hoping it helps someone fretting about their own exhaust choice.
January 28, 2014
Ride:
2010 Kawasaki VN900C Vulcan 900 Custom
Bang For The Buck
5 / 5
Ease Of Install
5 / 5
Durability
5 / 5
A Lion Roaring in the Jungle
Have you watched Lion King?
Well this RS4 Exhaust is like Simba.
Yoshimura just made my Ninja 650 loud and fierce. As I zoom by cars, I can hear it roar with fierce sound that echoes through the plains and the jungle.
Meet Yoshimura RS4, King of the Jungle.
August 23, 2016
Purchased
4 months ago
Ride:
2016 Kawasaki Ninja 650R ABS
Bang For The Buck
5 / 5
Ease Of Install
5 / 5
Durability
5 / 5
Great Sound and Looks, No need for Power Commander or Juice Box
I bought this exhaust for my 2013 Kawasaki Ninja 650. The sound of stock was docile and I wanted to be heard on the street and be safe, specially from the Car Drivers talking on the phone, while sipping their coffee and making a turn on intersections - or changing lanes :)
1. Even with the quiet insert that comes standard-pre installed, the sound is Loud, I was riding by and a couple of times cops gave me 'I hear you riding by' look in NJ :) ....I'm sure it would be insane louder without the quiet insert. I've heard people driving with mad loud exhausts in NJ anyway...
2. Power commander is not needed and this works fine as stock replacement, unless you are tuning for a particular race track and want to change fuel supply map to a custom map. I got this reply in email from Yoshimura customer service. Alas, I had already bought and installed it by then since they took two weeks to respond :).
3. I got the installation of the full exhaust and power commander V done by the dealer, after buying these from Revzilla. He charged me for 2 hours of labor for installation of both the things and computer tuning for standard map for power commander. Even though the bike only had 1000 miles I changed the gaskets .....what is another 30 bucks while i'm throwing in all my savings on Mods:)
4. Can't comment on durability as I've had this for only 50 miles but Revzilla wouldn't let me leave it alone so I've rated excellent
Cheers !!!
May 23, 2014
Ride:
2013 Kawasaki Ninja 650R ABS
Bang For The Buck
5 / 5
Ease Of Install
5 / 5
Durability
5 / 5
The Perfect Exhaust.
It's a beast. The sound is so good and the price is excellent. You don't even need a power commander or juice box for this exhaust.
May 7, 2015
Ride:
2014 Kawasaki Ninja 650R ABS
Bang For The Buck
5 / 5
Ease Of Install
5 / 5
Durability
5 / 5
Just awesome
I'll keep this short and sweet. This is an awesome exhaust in all aspects: sound, looks, performance (according to my butt). Just get it.

It gets rid of that motox stock sound of the Ninja 650, and replaces it with a low deep mean growl that definitely grabs the attention of bystanders and motorists. I definitely use it frequently to make my presence known to an inattentive car driver swaying into my path (it's not like there's many of those...........).

It sounds amazing without the db killer, but will definitely hurt your ears without earplugs after a while, and neighbors might complain at late hours. The silencer does a good job of lowering the sound level output but at the expense of some meanliness low deep growling, but it also saves your ears (Even if your ears don't hurt at that exact moment, high volume exposure to them will hurt them permanently over time and you can't get it back, so protect your ears at all time).

FYI: for those looking for a replacement db killer / 'low volume insert' this is the part you need:
http://www.yoshimura-rd.com/prodcat/ins-18-k-insert-kit-low-volume-rs-4-muffler-turn-out-end-cap.asp
April 3, 2015
Ride:
2014 Kawasaki Ninja 650R
Bang For The Buck
4 / 5
Ease Of Install
5 / 5
Durability
5 / 5
Best I've found for a 2012-2015 Ninja 650
Researched exhaust manufacturers / reviews / listened to a bunch of clips and found that, hands down, this exhaust is the best sounding of the lot in my opinion.

Great build quality, very easy to install(Don't even need to remove fairings) and looks amazing. Not sure if I noticed substantial, if any, performance gains. I bought it mainly for the sound/look -The silencer was the first thing to go.

So if you're on the fence about which exhaust to go for on the Ninja 650 I highly recommend checking the Yoshi RS-4 out.
February 9, 2015
Ride:
2014 Kawasaki Ninja 650R ABS
Bang For The Buck
5 / 5
Ease Of Install
5 / 5
Durability
5 / 5
Transformed my bike from a house cat to a ferocious jungle cat
I was debating between this and the other exhausts for the Ninja 650s for quite some time for my 2014 Ninja EX650. Watched all the videos I could find and read all the reviews. When you're dropping over 500 big ones you want to make sure you get something you like, right? Well, I definitely like! This exhaust is a monster! It's got a very deep growl to it. Sounds absolutely amazing and now people can actually hear me coming down the street.

I removed the silencer so I can't comment on what it sounds like with it in, but I would recommend removing. Pretty simple, unscrew the allen bolt and then comes the fun part of getting it out. I personally took both my thumbs and stuck them in the pipe and just pulled until it came out far enough that I could get a pair of channel locks around it and wiggled it out. Just make sure you tape off the channel locks so you don't scratch it to pieces.
August 14, 2015
Bang For The Buck
5 / 5
Ease Of Install
3 / 5
Durability
5 / 5
Great Product, Nice Sound
Installed this over the weekend.

TIP - Pull up the directions for the Two Brothers exhaust system if you want some better directions on how to remove your old exhaust. I fail at life when it comes to doing my installs so this took more like 3 hours for me lol.

The exhaust sounds much deeper and nicer in person ( I kept the DB insert in it.) I am extremely happy with the quality of the part. I used the spacers and all and will keep the DB insert in it for now.

My 2013 Ninja 650 ABS does backfire a little bit now but I haven't decided if I will end up committing to getting a power commander or juicebox. We'll see. :)

Am very happy with my purchase.
May 27, 2014
Bang For The Buck
5 / 5
Features
4 / 5
Style
5 / 5
Ease Of Install
5 / 5
Fit & Finish
4 / 5
Durability
4 / 5
Night and Day
Well first off I apologize Revzilla ,I did not buy this exhaust from you. BUT I SHOULD HAVE! I know, I'm sorry. Anyway ...

This is a full system exhaust, direct swap nothing extra or fancy required, not a juice box, not a milk jug, not a power commander, not necessary for all of you wondering. Because I was , A LOT. Straight answer : from yoshimura "We engineer and design our bike specific systems to stock system fuel mapping. Re tuning is not required unless you plan on racing. " over the phone , call if you want . 1 800 yoshimura

It will pop when decelerating, but it is not harmful and performance exhaust systems are know for it. Heat is not a problem , power is a lot smoother , even without retuning I notice throttle is tighter when I ease off like I have lot more range in mid rpm. I just took a long ride to big bear and through the canyons was an easier ride, this exhaust rumbles purrs roars pops , its firkin fourth of july at the shooting range with jimi hendrix ripping the star spangled banner ! If you ride in cali i don't suggest taking the silencer out. Not obnoxiously loud but if you want to set off alarms and give the neighbors their wake up call , you can. Silencer out all bets are off. You're that guy. Sound difference from stock is night and day. you will like it .

Installation was milk and cookies. Pro Tip:: Undo rear fairing screw. 6 mm hex on both sides and take out all three bottom fairing clips the three on the seam. This will give you the room and flexibility to just drop the old exhaust without having to take the fairings all the way off. After that you just screw nut and bolt.

Final word : Revzilla is where to shop , and if you're shopping for an exhaust for your ninja 650 this is the one.

2016 kawasaki ninja 650
September 29, 2016
Bang For The Buck
5 / 5
Ease Of Install
5 / 5
Durability
5 / 5
Absolutely AMAZING!
Just purchased this for my 2015 Ninja 650 ABS. Couldn't ask for a better experience as a rather new rider. Received it in just less than 24hrs with regular standard shipping. It looks absolutely amazing and sounds even better than expected. Not obnoxiously loud, but gives it a much lower/tougher sound that you can't resist after dealing with the very quiet stock exhaust. Installation couldn't have been any easier and I know very minimal about mechanics. Because it is so much smaller/lighter than the stock you can easily notice the little weight difference on the bike. You can also easily feel the difference in the slightly more HP that you get with this. No doubt will recommend to anyone and everyone. Very impressed and couldn't be more happy. GREAT BUY!!!
March 10, 2016
Ride:
2015 Kawasaki Ninja 650R ABS
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Browse 11 questions Browse 11 questions and 34 answers
Why did you choose this?
RevZilla Store
Heard great things! looks immersive and sounds sexy!
Jon B on Nov 15, 2016
Did a bunch of research comparing between the Yoshi and the 2Bros exhausts...this one won hands down. Can't wait to hear this beast on my bike!
Derek D on May 2, 2016
Heard great things! looks immersive and sounds sexy!
Jon B on Nov 15, 2016
Wanted to be heard on the road, but it's a bit too loud for my taste.
Yijing Z on May 15, 2016
Did a bunch of research comparing between the Yoshi and the 2Bros exhausts...this one won hands down. Can't wait to hear this beast on my bike!
Derek D on May 2, 2016
Just awesome sound and easy install. Only one things is it farts and pops a little on desell, but I have not installed block off plates as of yet.
David M on Apr 23, 2016
This exhaust was awesome! I no longer have this motorcycle but when I had it was great! Good sound and performance.
Michael Z on Apr 11, 2016
It had great reviews
Hari K on Apr 4, 2016
What more can you say about the Yoshimura exhaust! It sounds amazing and looks great on the bike. It is a little bit of a pain to get the headers on so I would recommend having someone to help you hold things up while you bolt them up. Everything else went very easy I would say it took me about an hour to install.
Jarod A on Mar 31, 2016
Great performance, great sound & looks great!
David S on Mar 12, 2016
Sounded awesome online, trusted the quality and am quite happy with the product/sound/fitment...great stuff...!!!
Bryan L on Jan 26, 2016
Yoshimura is the best, I wanted a loud deep voice for safety and nice intro :).
Abdullah E on Apr 25, 2015
Best sound and performance for the Ninja 650 IMO and I did lots of research. Very happy with mine.
Tamara T on Apr 2, 2015
Best reviews from Kawasaki ninja 650 owners on any site and youtube.
Parvez S on Nov 19, 2014
annoy everyone....
thing is f-in LOUD dude.
get one NOW!! Take db killer out of pipe
put pipe on bike and drive by cops...
NOW DUDE
Clay D on Jul 11, 2014
i wawn make my bikje go vroomvroooooom.
Jacob E on Mar 14, 2014
Wanted to be heard on the road, but it's a bit too loud for my taste.
Yijing Z on May 15, 2016
Just awesome sound and easy install. Only one things is it farts and pops a little on desell, but I have not installed block off plates as of yet.
David M on Apr 23, 2016
can I remove the baffle on rs4 system?
A shopper on Feb 22, 2016
I have a 2016 kawasaki ninja ex650 and im trying to see if this exhaust would fit on my bike?
A shopper on Feb 12, 2016
BEST ANSWER: This exhaust fits my bike and sounds GREAT. I would 100% recommend this exhaust! I put this one my 2014 Kawasaki Ninja 650 ABS and made a world of difference!
Will this exhaust fit on the ex650, 2012 model?
A shopper on Oct 17, 2016
BEST ANSWER: It should, it fit fine on my 2013. Redesign was 2012 so you should be fine.
Do you have to get your bike tuned after putting this exhaust on? Also do I need to buy anything else for this product to work properly?
Thomas N on May 27, 2014
BEST ANSWER: My Ninja 2013 650 ABS does backfire a bit so a juicebox or power commander might be useful but that is really up to you. It is running fine without one for me but I will probably get one in the future.
it says low db insert, is there an actual number on how loud it is?
A shopper on May 1, 2014
BEST ANSWER: I don't have any specific numbers on the db rating. However I purchased this exhaust a few weeks ago and am completely satisfied. The shipping box was excellent it comes shipped with the "low db insert" installed, i would describe it as a mild loud exhaust. Ride it around the block a few times with insert in it. Then removed insert and will never put it back in. Idle is nice and deep if u stand in front of the outlet of muffler it goes through your chest! Revving in neutral sounds a little high pitched for my taste, however under load while driving/ cruising it's a nice deep rich sound.
Hi,

I have "Kawasaki 2012 Ninja 650".
I'm looking for Exhaust upgrade, most likely Slip-On, because I live in USA, CA.
Main reason is to make it sound better, other advantages are welcome while legal with CA air laws.

Any advice which one I should by for my purpose?

Br, Oleg
A S on Aug 14, 2014
BEST ANSWER: For this exhaust, you'll get a full exhaust system, because the 650R's muffler can't be taken off. I'm not sure if the exhaust system allows for slip-ons after that. Also, this exhaust system requires the removal of the cat. converter, so it may interfere with CA's air laws.

As for sound, it makes it sound incredibly beefy and aggressive, and is also pretty loud (Just turning on my bike and night has caused neighbors to get upset, oops). If you want something with more of a "MotoGP" sound, I'd look at the leo vince.
Does this system require repacking?
Terrell C on Jun 2, 2014
BEST ANSWER: Every 7,000-10,000 miles.

Search for "Yoshimura RS-4 Muffler Re-Pack Instructions" on Youtube.
1. Is this for the racetrack only? Or can you use it for your day to day riding?
Brett H on May 12, 2014
BEST ANSWER: i use this exhaust daily just runs rich but no worries at all overall great exhaust
is baffle removable?
A shopper on Feb 22, 2016
BEST ANSWER: Yes, the baffle is removable it's held in by a 3mm Hex key, it is a little snug trying to remove it but I used a rag (to protect the baffle from scratching in case I wanted to reinsert) and needle nose pliers and eventually got it
looking for an exhaust system that would work on 2014 Kawasaki Ninja 400 special edition?
A C on Aug 9, 2016