How Much Power Can We Get From a 2023 YZ125? | Stock vs Tuned Shootout!

We are on a mission to build the world's best 125cc Dirt Bike. In this episode we compare a standard 2023 YZ125 - both on the dyno and on the MX track - against a YZ 125 with a stage one tune (that means bolt on goodies!). How much faster can we go on the Yamaha? Let's find out!
Make sure you subscribe to see the next episode where the bike gets the full works treatment. We upload epic motocross videos every week, so come and join our two stroke family! :-)
A big thanks goes to our awesome channel sponsors who help us to create these videos for you guys to watch and enjoy every week :-) So if you can, please support the brands that support us!
For all your motorcycle lubricants head over to: bit.ly/PutolineUK

[@user-vc2jz5zp2c]

Fire whoever played music over the 2 stroke noises on the dyno for the 2nd pull

[@justforfunvideohobby]

This is the video i've been waiting for. I bought the 2023 yz125 as soon as I got the money. Been 10 years since I last got on a bike.

[@bron2078]

Absolutely glued to this content!

[@twistymcslide2]

i make 42hp on mine. Wiseco piston , clutch and basket , GYTR pressure plate. Apex head ( mx dome ) , JD Jetting pilot/needle kit ( 72 pilot/190main ), VP T2 fuel (0.5-1.0 oz motul oil added per gallon to bring it down to a 35 - 32:1 ratio for more oiling effect ) , Bill's MX pipe , PC TI silencer . i also changed sprockets rom the oem 13/49t , to 14/48t . i can get it up to 83MPH . about a 10% increase everywhere, and LOTS of overrev where its still making power well over 14K RPM happily .

[@kevinmee3501]

Great video Max, the bikes ran really well and a big improvement on the tuned bike, Roland's going to be a busy boy, will be interesting to find out how expensive it is to build a championship winning bike. Nice work again Max great content.

[@999lazer]

Thanks Kevin. The bike were working on is going to be pretty cool when its finished:)

[@siraff4461]

I love Apex. I haven't been for years but its a real power track. I remember my mate racing a CR500 back in the 90's and around there the big bikes were completely dominant. The 500's, big Huskys and so on. Its a great track if you want fun and a workout.

[@Harry-TramAnh]

it's my local track and I find it quite overrated.

[@Lee-mx5li]

Great job on video, very informative.

[@999lazer]

Thank you!

[@raggingcars5116]

Great content just subscribed

[@davidmc3262]

good stuff mate 👍

[@Randy_Cox]

Great video and i have watched it many times waiting for the stage 2 video. Any eta for the stage 2 video? Wanna hear the little screamer rip again.👍

[@motobrostv1761]

Hp development offers 43hp packages for the previous yz125s and a bit more for the new gen. VHM definitely has their work cut out to beat that

[@jasonjaeger4042]

Power is great, but suspension and most importantly skill/practice is what makes someone fast.

[@michaelalias8756]

where is a link to that😊

[@corumstratton2317]

@jasonjaeger4042 i agree, my yz250 is too stiff for my liking and feels like the front end glids rather than digs in so I don't trust it, softer springs imbound🤙🏽

[@jasonjaeger4042]

@corum stratton ya running a YZ250 2-stroke? Smart man. That's what me and my son run, I've been running YZ250'S since '05. I'm 39 now and 180lbs so the suspension is ok for me but sending it to Pro Circuit next month for a revalve and their Linkage arm. Ran it on my '19 and loved it.

[@corumstratton2317]

@jasonjaeger4042 yeah 2017 mine is, absolutely love it👌🏽 I'm only 140 kitted up so she's a bit stiff for me haha😅

[@greathornedowl3644]

Thanks, love the channel. Like 2vintage channel the learning moments provided, my way of enjoying the sport without the expense.

[@999lazer]

Glad you enjoy it!

[@chargernk7748]

Lmao 2vintage is a goon compared to these guys

[@chadhunt6596]

2vintage does damn good work ass juice

[@zardportugal]

Best MX videos are HERE. Cheers.

[@Eric--zs6um]

Gd stuff folks. Thanks much

[@mattcowlard4662]

Please please please get a TM 125 on the Dyno it's the only 125 you haven't had on there so interesting as there's hardly any info back to back tests on them

[@Davido50]

Awesome machines! -Ohio

[@graememcelligott8874]

That's some great quick gains, hanging out to see how the next stages go. I recently sold my 2019 YZ125 - got too old to race anymore unfortunately. I had the GYTR pipe, VHM head, VForce 4 reeds, overbored Keihin carb with STIC insert and GET ignition and that bike ripped. I enjoyed it so much.

[@johnsands146]

All the right bits! I bet that was a blast to ride.

[@graememcelligott8874]

@@johnsands146 sure was, they really are briliant little bikes.

[@johnsands146]

@@graememcelligott8874 I'm right there Bud. 2019 with the same bits except I'm running an HGS, the Keihin with the Stic is sitting on the shelf and I haven't stretched to the GET fun box yet, and even that is a blast to ride. Cheers. Oh, and Rowland built me a nice stock engine. All about the fun!

[@dr.hugog.hackenbush9443]

Never too old to race!

[@techs1smh13]

@@dr.hugog.hackenbush9443 yep but too old to hit the ground. 😂

[@aotmxaotmx4701]

I like seeing the caption that the stock bike and stage 1 bike were both using a 175 main jet would have like to see needle and pilot also it seems to be the big topic online and I believe the 2023 comes with the USA pilot and needle. Was this kept ?

[@siraff4461]

You can guess how much faster its going to be. Imagine riding a 2hp, weightless bike (so 2hp against rider weight) for the amount of time the throttle is wide open and however far that would take you is going to be roughly the difference in distance. Then see how long it takes for the stock bike to cover that distance at its average speed around a lap and you can see the time difference. I based it on a 90kg rider in (in gear) and got roughly 3.1s as the possible difference. Considering there will be some time lost to extra wheelspin and the track got worse it wasn't all that far off. Of course its much more fun and much more accurate to get somone on it and see what really happens.

[@jpesicka999]

I got so much more power out of my 01 CR125 from a port job, racing head, PWK38 carb and VP T2 fuel. Never had it dyno'd but it pulls so hard. Also has A FMF Fatty pipe with a Shorty.

[@eastontutlies3954]

Yo, I got a 01 Cr125 too I got the cylinder ported, got the same carb as u, but I have vforce3 reeds too, I also have an fmf fatty to shorty and I got it up to 44hp on a dyno which is insane

[@harland292]

Keeping my 👀 peeled for stage 2 🫡

[@darylsmioth1904]

Curious the 23' YZ125 here in the states are too rich on the bottom to mid. What are you guys doing with the needle and pilot? Stock? thanks

[@jimmiebuckler997]

Way late but I moved to a smart carb- JD jetting kit fixes it as well.

[@craighills2382]

Stage 2 pipe ? I bought one 10 Months ago whats the difference please if I have 2022 first stage pipe ? Is it worth me upgrading ?

[@BIG_BODWELL]

you should build a twin cr500 (cr1000)

[@nickwukmir9853]

Mill head 60 th.clean up ports.leaded race gas drop main jet two sizes. Drop needle clip 1 notch. Pipe is only for weight. Uses stock.for budget.

[@jonschuma]

What's a Y zed?

[@krisengels7051]

Hello, nice tuning but you’re ‘22 stock test gave 34,2 hp on a stock bike. Now a tuned ‘23 makes only 34hp. Did yamaha made some changes?

[@olds97lss]

I just realized, this guy is Martin Compston! I've watched a ton of his videos and it just dawned on me how much he looks like that guy. In other news, I read that Line of Duty is doing another series at the end of 2023!!!

[@backwoods69]

i have a kx125 from 2008 and its boared to 145cc i think that does the trick

[@Jimmy_Watt]

Funny thing is that so many people throw money at mods and weight reduction, when a gym membership would be much cheaper. 😀

[@liammarlow6052]

Quick question max, I'm in the midlands and looking at places to get a full engine rebuild on my 2019 yz125, based on your experience what is a reasonable figure for this money wise so I don't get my pants pulled down? Cheers

[@bobhemphut4011]

Built not bought. Thats how you save $$$

[@justforfunvideohobby]

can you post a link to the CDI? I need to buy one!

[@RenaeRacer]

02:10 Why does he stand next to the bike after measuring the first modifications? The first measurements were done while sitting on the bike! This makes a big difference!

[@natdogg81]

Because 80 - 90 kgs of weight reduction makes the modifications added to the bike sell 😉

[@HarduroSK]

@@natdogg81 weight difference on dyno? really?

[@RenaeRacer]

@@HarduroSK A dyno is for visualizing every little difference in the setup. And it is a huge difference, if 80kg more are pushing on the roller!

[@janschaffer3594]

Why you dont sit at the bike while testing the tuned version?

[@markcleverly4597]

Its kinda interesting that a stock 1985 Cr125 has around the same or even a little bit more hp than the new YZ. Now granted, im not factoring in the weight of the bike, power curve, torque, ect. but it just seems a little odd the numbers didnt increase throughout that great amount of time. Open to thoughts and conversation 🤷‍♂️

[@mozer30]

When will the next video be landing?

[@make2strokesgreatagain512]

I like rolands hat 🤣👍

[@make2strokesgreatagain512]

Surely thats worth a couple of ponys

[@999lazer]

he loves that hat..lol

[@Patricks_Projects]

Failed test! Load on rear tire differs as he sat on in the first test, and stood next to it in the other. I can easily get 1hp+ from doing that in my own dyno.

[@chalo212]

The dyno test actually kind of let me down (But I was surprised with how linear the power delivery was) But the track result is eye opening...

[@slimsqde7397]

yea why so linear, i havnt ridden a 2 stroke dirtbike but i always hear about that power band, but i feel the dyno graph showed so sign of a power band, i did see that increase in the top end of the modded bike.

[@TheCraigy83]

@@slimsqde7397 go ride one , there's quite a step up as the power rolls on .

[@chalo212]

@@slimsqde7397 2 strokes usually feel like turbo charged engines hahahaha no power down the revs then BAM! All the power hits hahahaha KTMs TPI bikes have sort of changed this since they do produce more torque but still noticable.

[@slimsqde7397]

@@chalo212 ik that, thats why im confused why that isnt shown in the dyno graph, there is no change an slope or anything on the graph that would show an increase of power

[@slimsqde7397]

@@TheCraigy83 yes ik, that is what im saying, why isnt that shown in the dyno graph

[@johngray722]

3 seconds is massive

[@yamahakid450f]

Yeah that comes down to more than few HP gain, yeah it pulls longer with the CDI, which no doubt it helped the bike and let him pull a gear longer, but I think it's more line selection and getting a clear track to run the lines he wanted without getting stuck behind anyone.

[@ragnarironspear1791]

Money buys BHP 👍🏻

[@999lazer]

So true! Thanks for watching as always dude

[@user-fs8ox5qp6g]

👍👍👍

[@andybowyer3602]

Little ripper! I've got a tuned 240cc lambretta an it only just puts down 32 bhp🤣

[@henrikk7658]

no music for stage 2 pls

[@rockincop3991]

“WiFf DA WhY ZeD YAMAHR” Jesus Christ that drives me nuts.

[@scoopitydoop]

He should’ve done both Dyno’s the same!!! Why wasn’t he sitting on the bike for the stage 1 dyno? To gain 3 hp maybe??? I call shananigans!!!

[@bjornbezuidenhout8674]

Of your racing your better of just losing 5kg will give you a bigger difference

[@enkidusool6109]

STOCK 2:15:14 TUNED 2:12:53❤

[@justanotherjackleg7073]

First question: What is a Whhhyyyy ZAAAAAAY?

[@luigifiorillo7680]

There was a series of videos I looked regarding the tm factory in Italy that stated their 125 factory bike was at 55hp. I think that’s a bit high even for a 125. 250 I can see 55 but not a 125. Interested to see what is generated. I had a factory 125 in 97 that had 38hp.

[@romainbrb6935]

I watched the video and they were talking about their 125 go kart engine. Road racing 125 makes super high hp too but they both would be really unusable for motocross.

[@lexprue]

@Romain Brb exactly. Everyone would run a Tm if their 125 mx bike made 55 hp

[@nate_942]

@@lexprue in my opinion, if it wasn't for the availability issues with the TM's, you'd see them fairly often. TM Racing is definetly on the rise to the top!

[@lexprue]

@NATE very true. My friend's Dad is a dealer for Tm and they ride Tm so I've ridden a few 85s and a 112 so far I can say the build quality is great and since they come with a pipe and reeds optional vhm head and crank you can run them in the stock or mod class

[@robintenghult7307]

i am impressed

[@999lazer]

Thanks for watching Robin!

[@robintenghult7307]

@@999lazer thankz for making good content :D

[@iktorn3539]

31.5 WHP?

[@bradsimmons2071]

Any suggestions to get more low end power from the 22’ YZ125? Gearing?

[@harrypeterson9287]

Not a lot you can do. It's a small engine with low torque that needs high revs to make power. You just can't change the physics. You can get a big bore kit. Get a pipe that's designed to help the powerband come on a bit sooner at the expense of some mid to top pull. Make sure your jetting is just right. You could bump up the compression a bit. You could go overboard and reject the carb for methanol and do all of the above things. In general a 125 is going to be pretty gutless unless you wring out those RPMs.

[@michelnunes2932]

Top😍🇧🇷

[@sigvision4189]

If you don't race then the quickest easiest mod is to sell the 125 and buy a 250 😀

[@vyzai9662]

32,8hp my guess

[@ShaunSavage-kl9pd]

I need a good mechanic i ride hard crash a lot. I cant ride a bike without bent bars lol

[@haydenauten285]

Dyno must be way off because my 1998 yz125 makes 38 stock

[@nickhorne5493]

Am confused here the must mean whp because a Standard ktm 125 is about 38 ithink

[@xfdfff2620]

Different dynos show different results and no it dosen't lol

[@haydenauten285]

@@xfdfff2620 sure

[@motokurt13]

Alright Folks!!!! I absolutely love "999Lazers" videos and I in no way shape or form in trying to dog on this fine young man... But what on god's green earth is a "Y-(ZED)125? LMFAO I just don't understand why or where on earth he was taught that the (Z) is pronounced (ZEDDDD) not "Z" (actually pronounced (ZEEEEEEEEE) "like beeeeee but with a Z.... ROFL/LMFAO haha love ya big homie keep the badass footage coming my dude.

[@romainbrb6935]

You must be sarcastic man. Zee was just created by Americans for more convenience and also because they wanted the alphabet song to rythme with “ bee, cee, dee ,ee,…” The rest of the world speaking english say Zed. Even some other languages say Zed, like French.

[@Not_Sure-2020]

I've always thought the same...B isn't BED, it's BEEE. CEEE isn't CED. DEEEE isn't DED. ;)

[@powerwagon7811]

It's a euro thing.

[@cardude4life09]

I make 32 hp on stock sx 85

[@manitolas]

I think about power of 125s, the old ktm sx 125 2003 was the absolute beast.

[@rixogtr]

Please drop that horrid music during the important parts of this video like the dyno run. Also apart from the peak power, the air parameters in the dyno room at the stock run vs. the tuned run could be useful.

[@abutler0311]

It's not "Why Zed" it's "Why Zee" all Americans know this.

[@TheCraigy83]

Your language is English and they say zed for a thousand years before you guys said zeee.

[@bobhemphut4011]

History isn't taught in the USA today. Its re-education.... a severe dumbing down. Those who don't know their past and are doomed to repeat it...

[@TheCraigy83]

sub £8k they was sub 3k and the process to build them is far less time consuming then it was .

[@gazwit1603]

Only want to help you roland

[@donalddonaldson7211]

Variables

[@Matthew-ib2kz]

“Why Zed 125”

[@andrewwilson9130]

32.5

[@andrewwilson9130]

OMG THERE'S NO WAY I SWEAR I DIDN'T CHEAT

[@teenperfect5092]

Bro never say y zed again 😂 no body does. Good vid tho man.

[@TheCraigy83]

everyone in Britain says Y Zed .

[@turbosupra2jzdragracingtob249]

Stock dyno run was sitting on the bike…….

[@yamahadudeb24450]

32? Thats like a stock banshee hp

[@colinbox3472]

32 hp stock

[@SH1THOUSERY]

If your just messing. Why not buy a 250 if you want more power

[@stickerbombmoto2605]

33hp

[@mitjavolk8908]

45 HP

[@joshchatwin8569]

28hp my guess

[@gregcrayne4314]

34

[@nickwukmir9853]

29hp

[@wadinator038]

40hp

[@movitiate7634]

YZeeee not Yzet!

[@johnykryll]

Wow, all that expense for a miniscule gain, er.......no thanks

[@marktarascio4766]

The stock bike was too rich on bottom end .

[@justanotherjackleg7073]

@999lazer Is this You are a winner from our last giveaway thing legit? Says to text a number. Let me know please. It seems weird because I was giving you some crap about your British accent. Lol

[@999lazer]

No dude, those comments are from scammers. Don't click the links or text the numbers. But don't worry, i wouldn't hold a grudge about the accent thing! ;-D Haha thanks for watching dude

[@justanotherjackleg7073]

@@999lazer Thank you so much. Scammers should be have to dirt rake Lommel until it's smooth.

[@mattiaskarlsson3653]

Get rid of the music

[@dillonduty9769]

33 hp stock.

[@dillonduty9769]

Close!

[@williammayerhofer9887]

Bro copied and pasted

[@tynanthomas4839]

stop saying Yzed its Yzee

[@dr4cosb4ne5]

It doesn’t matter

[@rowanmoore4347]

From a 160 to a 175 jet makes no sence at alll

[@christerandersson5556]

They are lean on main stock. We run 175 to on my sons bike.

[@rowanmoore4347]

@@christerandersson5556 just find it very strange, just recently re jetted a 22 ,went from a a 160 to a 150main I'm at 1600m elevation .

[@christerandersson5556]

My sons was lean on 162 (stock) now with 175 its perfekt

[@johnnymckissick2735]

Its YZ, ZEEE. not y,zed. please for the love of god stop talking i cant even watch this channel.

[@motoyamasnigglepuff8654]

I feel the same its so bad I turn the sound off , its painful

[@robhayter484]

Nice videos these , but loose the background music ruins it

[@melihefeerdogan1287]

In turkey this bike new costs 14 to 15k euro 🥲🥲 but i’m still probably gonna get it so i have something to do there while on vacation ( and if someone knows a good gopro alternative for filming while riding please let me know so i can film aswel)

[@MX-rd3fc]

Can be compensated with Barcia Brain

[@motoyamasnigglepuff8654]

Here's your real list of mods, Pro Circuit pipe and silencer, throw HGS in the trash, next Smartcarb sc2 10 percent power gain straight outta the box, no jets vent tubes, zero guessing, next Ceramic Hybrid crank bearing from CBR bearings in the states, another 5 percent power gain for $130 a set, do it first tear down, next WPC friction reduction on all regular bearing and all metal to metal surfaces, another easy 10+plus percentage gain, and then VHM head and finally a Mitch Payton ported cylinder, yes he actually does it himself yet, if you ask for him personally, and VP race gas and maxima 927 at 40:1 to 50:1 depending on how much you wanna refresh the internals. Less oil more power and the WPC cuts down on friction big time, watch their videos, every F1 team does friction reduction... Any questions? And its Z not zed...

[@smokinamby]

Higher oil ratio provides more cooling at the expense of money. It does not increase horsepower what so ever. It can prevent overheating which can sap horsepower, but oil in itself cannot produce horsepower.

[@ianthomas38]

I’ve never ran into a moto KZbinr than runs more ads then you🤦🏽‍♂️

[@roberthiggins1419]

2hp for 0ver 2k . 😂😂😂 seriously That's a hard hell nooo

[@will7385]

8hp