We test the Most Expensive 450cc Dirt Bike of 2025

[@MichaelLyons-h4i]

I want to thank Motocross Action Magazine for being my go-to Motocross information source for the last 50 years. Ever since I was 13. 👍

[@jamesdelambo856]

True.

[@joshmosiman1955]

So cool, thank you for sticking with us!!

[@constantinelazarakis7998]

Exactly the same here! Living in Greece then, it was my connection with all going on in the young years of American motocross then. MXA and Dirt Bike!

[@oliverdurgen5953]

you don't polish an intake port. you polish the exhaust ports. the intake ports gets the exact opposite treatment, the surface is rough to help promote atomization through turbulence. the exhaust ports are polished to reduce turbulence, which increase flow/velocity.

[@jaysmokey]

👆🏼 this man knows

[@pauliewalnuts240]

Modern fuel injection has advanced to the point were fuel injectors have perfected the fuel spray pattern so that atomization of the fuel occurs upon injection into the fast flow of air entering the head... Many higher revving 4 strokes, engines that rev over 8k rpm, do indeed use polished intake & exhaust ports. inline 4 sport bikes commonly have this. Inorder to make power at high rpm, you need to maximize the cfm so that the most air flows in. Rough ports work against you at high rpm. polished ports are also used to prevent carbon build up in modern engines. On Older engines that used carburetors, it was important to leave the intake ports a little rough, so turbulence could mix the fuel and air for better atomization.

[@bossmonkey1126]

In 1978

[@AntDePietto51]

Polished intake ports mean more air quicker. I ported my mustang intake manifold for example. More air in, more horsepower, depending on if you can flow enough air out to make that worth while

[@jaysmokey]

@AntDePietto51 atomization is more important than volume. Unless you remove enough material to make a difference.

[@Buffington916]

You guys should do a RMZ 450 build similar to the SR, plus a shock and piston maybe, and compare the bikes and prices. That'd be interesting.

[@nickjpass]

Nah. Suzuki needs to update the bike, plain and simple.

[@sdb92]

Yeah, that’s what l wanna see. Spend the amount of money to bring it up to a WE/SR’s price range and see how good the RM-Z can get…😉

[@EDDIE-c7f8y]

@@sdb92 Never going to happen , Suzuki has made it very clear no more dirt bikes .

[@sdb92]

@@EDDIE-c7f8y Where have ya heard that? Any sources? ‘Cause people have been saying that shit for years now and obviously SUZUKI is still making dirt bikes…

[@UnsungThermidor]

​@@EDDIE-c7f8y They updated the DRZ, I believe if we are lucky theyll update the RMZ next year.

[@barkeep25]

4:36 4 cc's of oil !!! Sweet!!!

[@RVmotoTravel]

Hinson cover, but no actual clutch 😂😂

[@DontBother009]

I googled it and only get adds for clutch upgrades for it haha.

[@jamesdelambo856]

I know ,delusions of grandeur😂

[@joel387ktm]

Typical kawi cheapest way is always the way they go

[@bobthenob9017]

Absolute joke isn’t it, crazy to see how they are starting to sink them selves

[@JacksonD489]

The only reason for the $13,500 MSRP is that Kawasaki already knows they are going to have to do deep rebates to move them… That makes their $2500 rebate $1500 instead. They just padded the price up front!

[@jnljnl8485]

At these prices im not surprised i dont see anyone riding motorcycles out here in the desert any more. You can get a couple year old utv the whole family can enjoy and a teenager won't be a teenager by the time they mow enough lawns to buy a motorcycle.

[@StayTunedMoto]

Great review from credible people!

[@plunge422]

Best thumbnail shot!

[@motolocal7729]

Shout out from Philippines 🎉🎉🎉

[@dylanp9211]

We need a VS video this kawasaki Sr edition vs the Honda crf450r works edition. Or just a works edition mini shootout video.

[@Sliding-n-riding]

I can’t imagine Kawasaki not expecting to get scrutinized for Selling the most expensive bike in the class yet missing a bunch of key parts their competitors have for less. 😅

[@paulscountry456]

Dirt bikes are expensive anyway you look at it but look at how light and powerful they are suspensions are better and they handle better a bit every year as r&d will do.

[@Holeorpole]

The the 2025 kx450sr is hands down the best bike I have ever owned, the bike is so fast on the aggressive mode it’s so much fun! i have the 23 SR and the 24 model as well. I don't understand why everyone is hating on the 24 KX 450 about the power, yeah it's a little mild stock but not anywhere as bad as people exaggerate it to be. I put on a full PC exhaust modified the airbox a bit and a vortex ECU and it now has more bottom end grunt than my 23 SR.

[@mattjones1792]

When are u guys going to do the 2025 yz125 and yz250 2 stroke test video

[@OtisFlint]

It's really $6k more because the normal model always has a ton of rebates.

[@311hitwall]

nothing on this bike to justify the price

[@swampfox899]

Watch ride dji vidio on the price

[@PowersportRevivals]

What camera do yall use? I love the quality of it.

[@denniswilder3014]

15k out the door for a dirtbike is insane.no wonder the sport is dying.

[@dem0_o14]

Is there any stat or report to prove it? Just curious

[@Factory132z]

6k for the regular 24s on rebate. this is Targeted at the vet class demographic.

[@brettfrimmer6567]

That according to these guys still needs shit to make it right lol

[@LilLefty27]

@@Factory132zhonestly that’s the best deal. After a bunch of hours the used bike is worth $3000-4000 anyways. A $2k/3k loss is doable imo

[@lanwickum]

"Still a second gear motorcycle. Amazed they pushed the stock ECU that far. " Those statements tell how bad the regular KX450 is. They wrecked that engine with the '24 model year. Hope the suspension is still great. Love the KX suspension out of all the stock bikes.

[@Peanutdenver]

I rode my friends KX who I race with last summer and it is a dog. I let him ride my YZ to turn a few laps and he said "I think there's a motor issue with my bike". He was coming off a 23 KTM and got a deal from his local dealer on the KX...regrets

[@brettfrimmer6567]

You buy a 450 expecting a handful of violent power and should get what you pay for. Shouldn’t have to spend over $13k to get a kx450 with some balls that according to this review still needs a bunch of parts. Everybody hates on KTM but you don’t have to do shit to the KTM. Just ride it. It’s all there.

[@russel419]

​@@brettfrimmer6567the KTM forks are the only issue.

[@rikkilee9409]

in 1978 i paid $520 for a yamaha YZ80E the first year the 80 had the mono shock. this included 4% tax 2 strokes are just more fun if you can keep them in the powerband. plus they smell better!

[@lylesommers5018]

Beautiful bike, just one problem it’s a Kawasaki

[@RobertZsombori]

It's just your problem.😛

[@lylesommers5018]

@@RobertZsomborinot my problem,just my opinion which everyone is entitled to. As I said beautiful bike just not for me.

[@OtisFlint]

Yep, you know the quality will be awful as usual.

[@azzazel_99]

Kawasucki

[@yorkchris10]

I remember when Dirt Bike magazine started removing the counterbalancer from the can-am 500 Rotax engine and then KTM brought out their bike with the same engine without the balancer. Bye-bye can-am... happy revving...

[@AlienAI-69]

I want to be a test rider.

[@constantinelazarakis7998]

Wait for next year; hopefully, AI suspension is going to be ready to be used on MX bikes. That means, no need to manually adjust for a specific track or specific conditions. Within a few laps the system-software will 'learn' the terrain particularities and adjust accordingly. This learning will continue throughout the course of an event, and adjust automatically while you're riding. And this will also level the field between amateurs and pros who have the best suspension mechanics currently, to figure out these adjustments.

[@bobthenob9017]

Growing up I had nothing but Kawasaki from 85-125-250f but god damn are they starting to fall behind and starting to make 💩 , 13k and they can’t even put a real Hinson clutch inside lol, can’t believe am gonna say this but basically the kx sr is just a stock yzf 450 that’s how it’s coming across

[@EDDIE-c7f8y]

It really is , good call .

[@jamesdelambo856]

Almost 15,000$ otd.🎉stock hubs? Still a nice machine, but IDK.stock monster under 11k.

[@dr.hugog.hackenbush9443]

*watches in KX500*

[@Gaik526]

Bike actually sounds like it has no power

[@neekopeeko9054]

All the 4 strokes sound like that to me. It's awful

[@jamesdelambo856]

Yes sounds like a farting machine

[@Moto619films]

Waiting for the dealership to call me to get mine🤟

[@robmothershedrm]

nice !!!---TRY 2024 Keefer kx450 F Map----- adds MORE """SMOOTH SNAPPP !! ""' PUNCH

[@noknownthrone2487]

Still love my 2008 kx450, last model before fuel injection which brought a ton of extra weight, so my bike is pretty light for a 450, especially the new models. The bike has a ton of low end, and it was an MSRP of around 6k. The price nowadays is insane... like I can buy a side by side for that price. Looks gorgeous though.

[@ruymxsx7]

Yo tengo una Yamaha 450 2006 que funciona perfectamente.

[@JacksonD489]

I have a 2008 as well! I absolutely love that motorcycle… it was second to the CRF450R in MXA’s 450 shootout in 2008 which some considered the best 450 4-stroke ever made. I pretty much have mine set up just like the modern SR! It’s plenty good enough for me.

[@noknownthrone2487]

@ sick dude, love that bike. First nice dirt bike I have ever owned, my first big purchase as an adult. I grew up riding some really old beaters and made due with what I had… 1976 xl 75 >> 1979 rm 125 >> 1989 kx125 (loved that bike) >> 1996 yz250 (huge upgrade in bike handling and power) >> 2008 kx450. When I first rode my 450 I could not believe the power. Completely different animal to the 2 strokes I was used to, and really upped my skills. I was able to start making way better hill climbs and had excellent suspension for learning how to hit woops. My 450 has been sitting for a couple years and I really want to do a big maintenance on it, get some fresh plastics in which I’d like to find more of the modern fenders for the style… but I need to find some buddies to ride with. Moved to a new state and have no friends lol 😂

[@TheKayoO0]

@@noknownthrone2487 just got a brand new 2024 kx450 for $5500 usd with the rebate, plus freight, and PDI.

[@kingGar27]

Why don't manufactures introduce variable valve timing. It's proven to be reliable and can allow engines to offer low end grunt with plenty of top end power.

[@reedgalbraith6508]

Air intake is on top.. not sure how you would get dirt in intake unless you are servicing the bike upside down.

[@229glock]

Stark varg?

[@1sir-onworld]

🐝🏁 Video 👍

[@paulscountry456]

I love that blueish pipe and just looking at that motor it means buisness...

[@Madtigertv]

So... KX 450 SR OR CRF 450 WR ???

[@justsomeone6835]

The Honda

[@sdb92]

WE all the way! 🤙🏻

[@ochoabtor9597]

Yeah, missing a few things... 😂

[@goodboyringo9716]

The thought is raise the price and they'll buy it.

[@jasonjavelin]

Kawasaki continues to disappoint me by not reintroducing the modern KDX 200/ 300 to compete with the Betas and KTMs

[@JT-MXaussie]

The 450 looks so cool and sounds amazing but it so pricey

[@hugejohnson5011]

Polio is a harsh taskmaster.

[@jetyz125]

All the previous SR heads I've seen is basically nothing done to it. Literally 10 seconds with a cartridge roll and that's it. It does nothing to help the power.

[@jack-k6z7n]

U CAN GET A RMZ 450 OUT THE DOOR 4995.00

[@moto3463]

Nice

[@teslafieldphysics4041]

Over priced junk- give me any 1990’s Kawasaki, any day over that thing! Expensive junk.

[@Daveeeeeeeeeeeeeee]

haven't watched the video yet but i already its going to be heavily biases.

[@CrosbySheets]

Gnarly

[@ruymxsx7]

No se si han mejorado la calidad de los plásticos, si no es así enseguida se ponen mate, pierden el brillo. Y la moto luce muy mal.

[@fen2453]

Meanwhile KTM offers you so kuch bike for the money they bankrupted themselves

[@joshuadavis862]

Hey everyone Jesus saves accept him as your savior today and repent if you haven’t already he’s coming back soon be ready. Jesus Christ is Lord. ✝️❤❤

[@Reaperrr53]

Most expensive.....Gives it stock hubs and no swingarm decals,,,,

[@nathanielcoleman2117]

Clutch cover without the clutch is such a joke. That bike way over priced.

[@robertbeattie3988]

So for the extra price tag you get basically nothing, you would be better of just buying a brand new RMZ 450.

[@VernonChikandiwa]

First to comment 👀

[@jeanmichelblackburn3000]

Great job !

[@sdb92]

Needs KYB components! 🤙🏻

[@bossmonkey1126]

Fake A kit forks and Shock. Fake Hinson, I smell pit squid