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

[@MattDuke-v9e]

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

[@hazardcat7348]

bro i would have been banned for the words i was going to express

[@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 .

[@Mason-xx3dp]

I got the JD Jetting kit aswell, I found that the stock settings weren't very good in the middle to high revs but that was just riding the bike, I also put a GYTR full exhaust, a Vertex Coated Piston and I changed only the rear sprocket to 50t. not sure how many hp it is now but I'm wanting to add more, what do you think I should do next to it? I was thinking maybe a head, or a CDI/ECU what do you Think I should do?

[@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.

[@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😅

[@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

[@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!

[@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.

[@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.

[@patrickrushtonAussierider]

I would love to have a Stic Super X carb by Stic Super Torque, to fuel that bike. My 23 yz125x has a Super X as I wasn't happy with my dialed in keihin. The gains from off idle to over rev as well as significantly widening the power curve were very impressive. With the X carb at only 1/4 throttle, it will pull just as strong as the factory keihin did at full throttle. After experiencing the impressive gains from the X carb on its own, I got the power bug. I installed a TSP cylinder head, TSP ignition module and a pro circuit pipe and silencer. The gains from these other bolt on mods individually were not as impressive, as the Super X on its own and the other bolt ons only added on to the impressive gains from the X carb. I currently have the X high power tune installed which uses a 80 pilot and a 200 main. Riders who I offered a test ride to think its a 150, its so smooth and strong and lugs very well in technical single track and actually has some bottom end torque. It will scream and pull forever on a mx track. It's so versatile. I would fit a Super X carb before a cylinder head, cdi, pipe change or big bore kit.

[@ottokirk2325]

Same same for my stock 200SX +Super X. At the track a buddy saw me mixing it up with faster riders on big 4t's. He asked what got into me. LOL I run the slowest turn G2 throttle cam, otherwise it's mayhem a tick above idle. I talked to a CR125 rider that removed the PWK STIC block, as it was too potent for his liking. Too bad he didn't know how to get his own setting.

[@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:)

[@jpesicka492]

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

[@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. 😂

[@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.

[@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?

[@BIG_BODWELL]

you should build a twin cr500 (cr1000)

[@valdemaryz8523]

hello man nice video. i am rideing a stock 125 and thinking about tuning it and your video gives me a good idea about what to get. but.. that geet cdi box you use? is that re progammed or just stock? #91

[@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 🤷‍♂️

[@ianbannister517]

Wow expected more than that tbh

[@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.

[@Jimmy_Watt]

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

[@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

[@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.👍

[@harland292]

Keeping my 👀 peeled for stage 2 🫡

[@backwoods69]

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

[@janschaffer3594]

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

[@10wsnorty]

Have you tuned a cr 125? Got one my self looking to tune

[@Sam-bz4hf]

Brilliant video from sam oates bideford and demi the dog

[@make2strokesgreatagain512]

I like rolands hat 🤣👍

[@make2strokesgreatagain512]

Surely thats worth a couple of ponys

[@999lazer]

he loves that hat..lol

[@Lee-mx5li]

Great job on video, very informative.

[@999lazer]

Thank you!

[@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 ?

[@zardportugal]

Best MX videos are HERE. Cheers.

[@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 $$$

[@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!!!

[@rockincop3991]

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

[@ragnarironspear1791]

Money buys BHP 👍🏻

[@999lazer]

So true! Thanks for watching as always dude

[@Eric--zs6um]

Gd stuff folks. Thanks much

[@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?

[@justforfunvideohobby]

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

[@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 ?

[@enkidusool6109]

STOCK 2:15:14 TUNED 2:12:53❤

[@bjornbezuidenhout8674]

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

[@raggingcars5116]

Great content just subscribed

[@mozer30]

When will the next video be landing?

[@henrikk7658]

no music for stage 2 pls

[@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

[@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!!!

[@davidmc3262]

good stuff mate 👍

[@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

[@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.

[@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

[@justanotherjackleg7073]

First question: What is a Whhhyyyy ZAAAAAAY?

[@MikeAsbury-ti2yx]

All you need is 3 teeth added to rear sprocket you guys are funny that's why you can't shift it & bogs around corners & maybe one size bigger main jet

[@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.

[@sigvision4189]

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

[@andybowyer3602]

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

[@iktorn3539]

31.5 WHP?

[@ianbannister517]

New one 46

[@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.

[@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.

[@Over_Taxed_USA]

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...

[@ianbannister517]

33

[@TheCraigy83]

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

[@MikeAsbury-ti2yx]

I don't think either one could take a 82, yz125 in any drag racing

[@vyzai9662]

32,8hp my guess

[@あごえもん]

👍👍👍

[@ShaunSavage-kl9pd]

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

[@robintenghult7307]

i am impressed

[@999lazer]

Thanks for watching Robin!

[@robintenghult7307]

@@999lazer thankz for making good content :D

[@turbosupra2jzdragracingtob249]

Stock dyno run was sitting on the bike…….

[@propacollector3499]

you still haveint told us what1 159 is with honda red sayshonda but peoplesaying ktm whitch dont make sense

[@gazwit1603]

Only want to help you roland

[@yamahadudeb24450]

32? Thats like a stock banshee hp

[@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.

[@SH1THOUSERY]

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

[@teenperfect5092]

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

[@TheCraigy83]

everyone in Britain says Y Zed .

[@colinbox3472]

32 hp stock

[@joshchatwin8569]

28hp my guess

[@donalddonaldson7211]

Variables

[@marktarascio4766]

The stock bike was too rich on bottom end .

[@movitiate7634]

YZeeee not Yzet!

[@johnykryll]

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

[@michelnunes2932]

Top😍🇧🇷

[@mitjavolk8908]

45 HP

[@LeonidMartushev]

Bro its not an used its a yz

[@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.

[@robhayter484]

Nice videos these , but loose the background music ruins it

[@andrewwilson9130]

32.5

[@andrewwilson9130]

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

[@Wadinator038]

40hp

[@1madcountrymumma]

🐎🐎

[@mattiaskarlsson3653]

Get rid of the music

[@nickwukmir9853]

29hp

[@gregcrayne4314]

34

[@dillonduty9769]

33 hp stock.

[@dillonduty9769]

Close!

[@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

[@williammayerhofer9887]

Bro copied and pasted

[@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

[@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.

[@MX-rd3fc]

Can be compensated with Barcia Brain