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

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.

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

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 .

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.

Brilliant video from sam oates bideford and demi the dog

Great content just subscribed

good stuff mate 👍

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

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.

Best MX videos are HERE. Cheers.

Great job on video, very informative.

Gd stuff folks. Thanks much

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

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.

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

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.

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

Keeping my 👀 peeled for stage 2 🫡

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.👍

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.

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.

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!

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 ?

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!!!

you should build a twin cr500 (cr1000)

I like rolands hat 🤣👍

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.

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.

“Why Zed 125”

What's a Y zed?

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

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 🤷‍♂️

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 ?

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?

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

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

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

Money buys BHP 👍🏻

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

3 seconds is massive

When will the next video be landing?

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!!!

👍👍👍

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

First question: What is a Whhhyyyy ZAAAAAAY?

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

Top😍🇧🇷

no music for stage 2 pls

STOCK 2:15:14 TUNED 2:12:53❤

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...

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

I make 32 hp on stock sx 85

i am impressed

31.5 WHP?

32,8hp my guess

Only want to help you roland

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

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.

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.

Variables

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

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

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.

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

32? Thats like a stock banshee hp

Stock dyno run was sitting on the bike…….

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

45 HP

29hp

33hp

28hp my guess

34

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

40hp

35hp

32 hp stock

32.5

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

YZeeee not Yzet!

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

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

The stock bike was too rich on bottom end .

@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

Get rid of the music

Nice videos these , but loose the background music ruins it

33 hp stock.

stop saying Yzed its Yzee

Bro copied and pasted

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

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

Can be compensated with Barcia Brain

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

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)

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...

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

8hp