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2023 Kawasaki ZX4RR | Full Exhaust vs Slip On Dyno Numbers

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This 2023 ZX4 came in with a FULL exhaust system and I just so happen to have the same bike at the shop there with a slip on. How do the dyno numbers compare after a Moore Mafia ECU flash??
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Опубликовано:

28 авг 2024

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Комментарии : 231

@alexventrov6826 Год назад

I suspect the Akra headers are a little restrictive since it's designed for the Zx-25r. Would like to see the difference with a full graves or other brand that's made for the zx-4r.

@GMdrivingMOPARguy Год назад

That was my thought too. The header might just be a little bit restrictive for the 400

@Angel_EU34 Год назад

Came to say exactly that. The results check out as well, if you use slightly narrower mains on the exhaust you gain a bit on the low and midrange. I feel bad for the guy that bought the system, shipping it from Japan was expensive for sure :\

@chadrichards8930 Год назад

@@Angel_EU34 Huh? Akropovic exhausts are not from Japan...

@alexventrov6826 Год назад

@@chadrichards8930 No they're not made in Japan, but he bought it from Japan because they have the Zx-25r there and not in the U.S.

@emmettturner9452 Год назад

@@alexventrov6826ZX-25R exists in other places too but Japan is probably the easiest to find it at retail. Does the company ship directly to consumers if you called them up to order one?

@cameronharrell5332 Год назад

That Akrapovic sounds so good.

@exothermal.sprocket Год назад

For one thing, Akrapovic designed that header system to flow for a 250cc engine. Even if the cylinder spacing is the same for the 400, I very much doubt the flow characteristics are optimized for the bigger engine. With the difference in dyno room temp, yes, you'll have a difference in horsepower (the humidity increase also saps a little power). But at this level, I'd say the slip-on Graves is the most cost effective way to go.

@pietervanbreda4360 Год назад

Full system sounds nice but if there is a big price difference the slip-on will do

@andrewmurphy6906 Год назад

Thanks for all the info. It's great to see you show what the add ons and tuning does. You can really see the difference. This cuts through all the bs. Great job.

@KoreyByrne Год назад

That’s crazy it’s similar hp to many Harley’s that are around 1800cc

@brumfiba 3 месяца назад

Nothing is more efficient at turning gasoline into heat and noise without all that pesky horsepower like a Harley

@29031994290 2 месяца назад

its not crazy, its engine speed. if you revd a harley engine to 13k rpm it would make a lot of power (considering it wouldnt blow up 😂)

@franklinwilkerson2061 Год назад

Your channel could be about how fast different paints dry and we'd still be captivated. Keep up the great work Chrissy my boy!

@M16xDr0pSh0tz Год назад

nah im here for the bikes, but his personality is cool too

@jaycevessier7554 Год назад

Even if it costs more for the full system and the slip on made more power, I’d still spend the extra coin to have that sound. The full system is addicting

@mattaccordr1253 Год назад

Header tubes are probably too small since it's for the ZX25 plus crossover tubes will hurt peak hp. Not a fair full system comparison

@neilgaming2127 Год назад

Tst says the headers were meant for zx25r meaning a 400cc engine capacity needed to breath different. So yeah, this full system for zx25 isn't worth it. The bike doesn't breath properly. Graves already make a full system works 2 for the zx4rr. I think that will make more power than this zx25r model system

@alexventrov6826 Год назад

Exactly what I was thinking. Could've been better just cutting that cat and leaving the stock headers with the Akra tip.

@neilgaming2127 Год назад

If a slip on with proper size can gain 71 horsepower more than the full system. Then the headers is not compatible with the 4R. I think the diameter is smaller, the 4r needs something a lil bigger for the air to flow properly. There's a video Indonesian guy upgrades his zx25r engine to the 4r. When he used his old 25r exhaust system his horsepower drop significantly his bike ran worst. Can't even keep up with the normal 25r. When he upgraded to larger diameter exhaust the bike does gain huge horsepower that he can dust other 25r

@chadrichards8930 Год назад

@@neilgaming2127 It did not gain 71 MORE hp than the full system...

@neilgaming2127 Год назад

@@chadrichards8930 it's not meant for the zx4rr. That system is for the zx25r

@northernninja3321 Год назад

Glad to see you confirm this. I saw a racer do pretty comprehensive testing back to back on both and found 0.5 to 1hp difference with the Graves vs the Akro full system. You missed the sound clip on the Akro in the comparison section I think though!

@rissellthomas3254 Год назад

Very interesting Chris. The full exhaust, headers and all , really isn't worth it unless colder temps make a difference. Thanks alot buddy.

@MercilessGuitar151 Год назад

Wel, a exhaust designed for a 250 on a 400 you mean. Let's wait for a exhaust designed for this engine to cone and see what happens. Just because it bolts straight up, doesn't mean it will be right for the job. I think owner stupidity is definitely a factor here.

@eirikaustad7580 Год назад

Do this again with a real ZX-4RR full exhaust. Maybe a Graves full exhaust. The ZX-25R exhaust is hurting it's performance. Like the other guy said the header tubes are probably too small.

@kylejf9059 Год назад

Akrapovic sounds 9/10, value 4/10. Graves slip on sounds 7/10 but value 9/10. I guess if you're buying this you probably have some spare cash so the full system probably still worth it to an extent, but if you aren't that fussed the slip on is absolutely stunning value and still sounds excellent (imo).

@elgar6743 Год назад

WOW...the sound without the baffle...pure Kawasaki growl!! The marginal difference is just that, marginal, and if you can swing it, the full system is the bomb.

@MercilessGuitar151 Год назад

Why put a restrictive that is not designed for that engine on, just for sound? That's stuoid af. Be patient and wait for the proper parts to come out.

@elgar6743 Год назад

@@MercilessGuitar151 My comment was referencing the sound quality between the 2 options shown in the video. Ergo, since that flew over your head, your non contextual reply, according to your standards, is '..stuoid af', obviously. Be patient and wait until you actually understand a comment before your reply to a comment. Peace bro...

@SquireSCA Год назад

Just goes to show, that the bike makers have gotten really good at header design. It's all the shit that comes after the headers, that clog things up... Removing that with a decat and a slip-on, is often just as good as a full system, on a lot of bikes...

@shoebkh1 Год назад

Looking by the numbers the Graves Slip-on seems a better fit and bang for the buck in comparison to the full system. As mentioned it could be the back pressure at higher RPM's that works for the Slip-on. So best bet is as this is just a 400 better to go with the slip-ons and save a lot of money for some other mods like lighter wheels, sprockets, upgraded brakes etc and so on. 70+ hp is good enough for street use and with that redline they sound sweet. Cheers! Happy Riding!

@YAMAHAMD2020 Год назад

Graves has that buzz 😪, Akro has the depth i like! 💪🏁 great job explaining everything important Mr.Moore 💪

@72garibay Год назад

I like the slip on 🎉 I think graves got it right and the price can’t go wrong with it with just the slip on 🎉 Slip on graves Air filter Ecu flash Can’t wait to do mine

@youngelz79 Год назад

This is the most realist honest comparison thanks Chris keep up the great content

@iamthelaw69 2 месяца назад

Thanks so much for this video. For the price difference and the fact you can get over 70whp on just slip-on, it proves the real limiting factor is the factory tune more than the hardware.

@motomani-ax Год назад

Heck yea! that thing sounds so much better without the baffle. (Full system) Great video as always!

@Sunedosa Год назад

It sounds freaking amazing.

@jefferywhite5636 Год назад

the akra w/o the baffle sounds awsome you need to do dyno when it's cooler in the am then see what happens ,conventional wisdom is you make more hp in cooler air than hot........

@daveyt4802 Год назад

Want to the the new Suzuki GSX 8S full system dyno tune next please!!

@footballa57 2 месяца назад

Biggest benefit of a full exhaust is weight reduction. Marginal hp differences between the two. Great video.

@willie69420 Год назад

I like the sound of which ever one is cheaper!

@nickrider5220 Год назад

There's a massive difference in size between a 250 and 400 - the same percentage difference as a 1000 v 1600 cc. The bigger engine needs larger diameter headers etc the 250 exhaust will be restrictive on the 400.

@M16xDr0pSh0tz Год назад

lol 150 cc difference aint shit

@TheHavoc09 Год назад

@M16xDr0pSh0tz did you learn percentages in elementary school?

@davidchiarletti4648 Год назад

@@M16xDr0pSh0tz you talking cos you got a tongue !GATE13SW6CREW c.f.c

@sugarnads Год назад

@@M16xDr0pSh0tzlol. Its a 3rd larger twit.

@Couchsteven Год назад

Would love to see these bikes drag 400m. Come on Chris vs your brother. I am sure your customers won't mind. Let's do this 🏁 🏍 💪

@franklinwilkerson2061 Год назад

Also, Akrapovic exhausts (full) are bike specific. The 400rr is nearly double the displacement so of course it ain't gonna work as well as something engineered to match the volume of gasses from a 250.

@rudedog3529 Год назад

I have a full TI Graves and sprint filter on my ZX4rr that I got a couple of weeks ago. Desert has been too hot , lately to do a run for top speed. Stock speed was 122 Mph. Will post top speed run when the desert cools off or I find another low altitude road.

@derick12331 Год назад

What is the price for a ZX4rr

@pauldupouy7337 Год назад

$10k ballpark.

@sugarnads Год назад

Shit my gsxr400 would pull 120 back in 1985... But it was 60hp native

@Iamwhatiam76 5 месяцев назад

Even the restricted version top speed is around 130mph how yours only 122?

@Sanjko87 Год назад

More vidoes like this would be really great seeing funk vidoes. This is what I liked the most about this channel Judy watching dyno vids.

@dominiquedinkins3686 Год назад

I’ll be making a trip soon from NC 🦾

@slyman0057 Год назад

WNC is where that one lives.

@hi_tech_reptiles Год назад

Id love to get a bike like this. Sucks they dont make 4cyl bikes under 600cc anymore, at least sold here in the US. Sounds awesome tho, glad people are getting some extra performance out of them too.

@kathygarber3230 Год назад

This one is a 4 cylinder

@IndyMotoRider Год назад

🤣 the zx4r IS a 4cyl bike

@sugarnads Год назад

Dude. Think before post. This is a 4 cylinder 400cc bike you can buy in america. You dont get the full bore version tho

@clems_enumclaw_powersports 3 месяца назад

@9:30 THAT SWEET, SWEET MUSIC OF 16K+ RPM

@imperialtekk9443 Год назад

Not gonna lie that little 400 sounds awesome. Im sure the zx25 headers is whats killing the max power. That akro with no baffle and a header made for it the zx4rr would probably make the same amount of power as the other bike.

@Naldo_S1K Год назад

Night and day sound without the DB killer!

@bellydavezx10r48 Год назад

I like how both sound but once you took that baffle out it made it sound 1000% better.

@ronducharme2766 Год назад

Going to race it? Full Akra's for the weight savings. Street/track day only, Graves Slip-on for the win! Great video!!

@AST4EVER Год назад

10:05 try a combo of Graves slip on with Akra full system pipes....

@Cultofpersonality09129 Год назад

That thing sounds awesome for a 400.

@Ontharock Год назад

I have a 2015 zx10r. Cat delete with a mid pipe and a two brothers slip on. k&n airfilter flashed and tuned. There is a definite, instantly noticeable difference with the DB killer installed. It loses power for sure. I took that thing out and threw it away.

@tomg4592 Год назад

The graves slip-on sure does sound good considering the cat and original headers are still in place.

@tsharabi4 Год назад

cant wait till you tune mine

@adamsturrock4649 Год назад

Seems like it's suffocating itself at about 14k rpm you can hear a volume difference. As other have said I would think the pipes are too small on the zx25 system. (that or maybe the valves are floating 🤷)

@sugarnads Год назад

Its not moving. Theyre designed to run with ram air

@kevind_53 Год назад

I was waiting on that one🚀🚀🚀 Thanks🤝

@jasonkeating9958 Год назад

Wonder if that muffler on the factory headers are cat delete would have been the best option

@zinser642 Год назад

This exact testing is in the works 😊

@xe1zlgg Год назад

Very fun video.... all way to the end... thanks 😊

@youbadolivez Год назад

absolutely love that bike

@gustavopolanco6925 Год назад

The problem is for the price of the bike + the tune is past 600 and 750s territory, just get a 1000cc bike. This would be a great 9k$ bike.

@DoRC Год назад

I'm not too surprised about this. With such a small engine it probably wasn't hard for Kawasaki to make a stock exhaust that already wasn't restrictive.

@HemivsNinja Год назад

Seems like the only upside to the full exhaust is the weight loss as opposed to the slip on. However minuscule that may be.

@johnraguccl9285 Год назад

Unfortunately that system is not design for that bike. If it is not an issue, then why is Akrapovic not marketing that system for the ZX4RR? They would save a lot of money on R&D and production costs, since that system is in production. They must be designing a new header and that's if they even come out with a system for that bike at all. But most likely the ZX-25 header is restricting the exhaust flow. Anyone else who has tested say the Graves full exhaust, has gotten a decent increase over the slip on.

@Evan-nl2hg Год назад

In my experience the akrapovic full titanium system on bigger bikes with different motor applications have either had minimal or the same gains as other systems, but where you pay extra $ for the Akra is because it's the lightest weight, which means less mass to move

@Cultofpersonality09129 Год назад

5 or 10 lbs isn’t a weight savings. It’s an empty stomach and a big dump in the morning.

@M16xDr0pSh0tz Год назад

akra are overpriced and overhpyed and the people who drop 1000s for them are dumb

@mokokawi Год назад

My cousin might get a ZX4 ❤ I shared this video with him

@bentalbottalbot Год назад

Don’t lie

@Wildman-wr1sz Год назад

I like the graves for the sound and the money.

@richardcarr6493 Год назад

FOR THE STREET a slip on and tune is good enough FOR TRACK lets go the whole hog for that sound :) HEY GREAT VIDEO WELL EXPLAINED it answers the questions us gear heads wanna know!!

@myjidisme Год назад

Hey chris, that's a great video for comparing between 2kind of full system exhaust and ¾ grave exhaust. But i had a thought that the factor the akra got lil bit less hp due to the zx25 akra exhaust itself. With that much different cc(150cc) will be affected to the diameter of the header. If there any manufacturer has made the specific exhaust for the zx4, i think it will produce more hp than what you have now. BTW love to see your works, keep it up 🔥

@858415 Год назад

It might not be that big of a performer, but damn that bike is sexy as F

@zackg6444 4 месяца назад

Full exhaust definitely sounds better in my personal opinion

@spdygon2766 10 месяцев назад

About right …70-72 hp full exhaust, air filter and tune some have even used race oil and gained 1-2 hp more

@craigsanders6925 Год назад

Tube diameters not optimized for the 400. My ZXR400sp from the 90's made more Hp and weighed a lot less. It was about 325 lbs with a stock tank. Put ZX6r wheels and the ZX6r forks and brakes on it and it was lighter yet. Mid 2000 ZX6r forks slid right into the stock triples. Forks weren't much better than stock but the brakes were a lot better.

@kellesmith91 Год назад

24 zx6r is a must see

@msanders98 Год назад

I'll go slip on . Thanks for saving me the dough.

@aequitas8749 Год назад

Please do a video on a full exhaust system designed specifically for the ZX-4R.

@dariopavelic5386 Месяц назад

Hi mate. I have one question! Why rider mode and qks are flashing? Nice video😉

@priceallen4368 Год назад

Essentially the same. However, variables between bikes can make a big difference. Tire pressure, cleanliness of chain, break-in procedure. Are the ZX25r Akra primary pipes as wide or wider than the stock ZX4r primaries? Big muffler but with cat vs smaller muffler but w/o cat. I think it's safe to say these two bikes.......not sure they can be compared.

@jasonkeating9958 Год назад

We always see massive engine changes on go karts but surely this would be an excellent option especially when fully tuned, I'm thinking that this engine tuned with everything possible and fitted into a formula 1 250cc superkart, That would be pretty sweet.

@2wheelshan134 Год назад

The Graves sounds good but that Akrapovic straight screams

@LNVACVAC Год назад

On other channels people are reaching 73-74 HP with the 250 exhaust.

@the._.bohemian3096 Месяц назад

Akro sounds better. But for the price....give me the graves. My wife's 4rr has a ko lightning slip on and sounds wicked. Chris should have the ECU soon to do the flash.

@kevinbean9380 Год назад

Please tell me its the guys bike watching through the window lmao

@mech5 Год назад

My ears say full system my pockets say slip-on.

@Nunyabizzked Год назад

😂

@daGrinch_zx10r Год назад

Those 4r's sound good for what they are. Definitely would go slip on route and put the $$$ saved from full system into other tasteful mods.

@datboifred Год назад

Crazy up there 89 degrees is hot. In houston its 80 degrees at night and 100 during the day currently smh

@daveyt4802 Год назад

Florida Lime's bike?? Yep, FL plates!

@tysoncott7402 Год назад

I like the deeper softer tone of the graves s/o, i like akra’s but it didnt sound as good to my 47yr old ears.

@MrH250 Год назад

Yep them Akro headers for the 250 will be too small for the 400. What did we expect?? The suspension on that 4RR looks pants on the dyno.

@kendrickh91 Год назад

Without the baffle👌🏿🤤

@conanthedestroyer7123 Год назад

I like the stock sound. same HP and torque.

@Dannyvirk Год назад

7:42 Savage....

@randyanacleto5229 Год назад

Tbh, the savings might be in the weight. How much does the stock header and cat weigh vs the full system? HP doesn't have to come from the engine all the time but also the weight...

@PotatoeJoe69 3 месяца назад

Full exhaust sounds better, and I would gladly take the mere 3/4 of a single peak hp difference for the sound and improved bottom end.

@rs5001988 Год назад

I do enjoy your posts dude! Keep up the good work brother

@alandarnell1885 Год назад

Probably because it’s a exhaust for a 250

@skatepark1ful Год назад

WOWOWOW!!! That's awesome!! That LITTLE GIRL better be careful and or a be good rider!!! What a LUCKY LITTLE GIRL!! to have her parents buy it and HAVE YOU do the fantastic tune!!!! cheers and thnx for the vid

@jimamizzi1 4 месяца назад

Going by the figures the full exhaust system is not worth the money, did you say the full system was for a 250?

@cas-tv2tl Год назад

Full system!

@g2zzdohc Год назад

Stock slip on was 56hp and stock full exhaust was 49hp

@DDM_LOS Год назад

That’s sounds amazing for a 400

@gldmembr6132 Месяц назад

How bout a sprocket size change?

@busabro6533 Год назад

I noticed the acro header has dual crossover pipes between the primary runners on the header. Does the stock header have the crossovers in its design? That would account for the difference in the peak power produced by the stock header.