This is exactly what yamaha needs to build, YZ power house, with all the extras that make the euro bikes appealing.

These videos of the the older bikes that guys have is awesome. Just shows that new is not always needed and clever mods over years is cool!

Truly the ultimate yz trail machine!

Super cool. I had a friend that did basically the same to one. He only used certain WR gears. I think that was to avoid the machining. He also did the BB kit if I recall correctly. I asked him if he was going to buy a 250x when they first came out and he looked at me kinda funny and said "Why would I do that, I've already built one". He got tired of waiting for it!

I have a 2021 YZ250X with lectron carb, reeds, gnarly pipe and fmf silencer, apex head and so on. Greatest bike I have ever owned. Ridden all the new ktms everything, never would give up my YZ. Oh and mine gets great gas mileage

That headlight😍 Really cool YZ trail bike!

I just upgraded to a 2016 YZ250X.. And couldn't be happier..FMF Gnarly pipe and one tooth down on front. This thing has all the power you need down low and mid. Feels like a 300.

Man I miss my 86’ IT200, YZ250 suspension and full exhaust, not a WORKS bike but she was magic for hours on tight hilly trails. Race gas kept her running cool.

I have a 2017 YZ250X with a SmartCarb and Scott's stabilizer and it's STUPID amounts of fun to ride.

Always tune in YAMAHA YZ 250 ❤️ my dream bike

Thing is really nice. For a big guy I can see why you would need more juice for fans etc. 🤘🏻

Love the yz 250s. Back in the day had a 89 yz 250 wr . Sthealy flywheel weght, pro circuiy pipe, boyeseen reeds it was sweet

Sweet ride!!

That's awesome!

Cool bike!

This is my dream bike, i think about it all the timd

@Aris Torm, my yz250 shifts like butter, literally the smoothest & best shifting bike I’ve ever owned. You are full it Aris

Nice build!

Rad bike! Should sale mine and buy 4 of them.

love the build , but magnetic drag is not the same as a flywheel weight , infact its 100% an inverse effect. A flywheel weight keeps the engine running through stored energy in the form of momentum decreasing the chances of engine stall at low RPM , Magnets even if as heavy as the GYTR weight are actively trying to shut the engine off at all times increasing the stall effect. Now maybe the mass of the total system minus the drag from the magnets equals out to a net zero effect but the way you said it on the video did not sound that way. Regardless i'm really impressed with all the electronics you added onto the bike. As a YZ250 single track trail rider its pretty inspiring. Im doing everything i can to my 2007 YZ to justify not buying one of these state of the art fuel injected 300 KTM,Husqvarnas,GasGas bikes but its difficult. What you can get from the factory today and not have to do any work is pretty damn impressive , especially when the price isn't what's stopping you. im just a die hard YZ250 guy.

Such a cool bike, better than a new one for sure

Good stuff.

The WR 400/426 transmission swap is easy and worth it.

I have a 1996 Yamaha wr250 you should try out, It has a GYT long rod kit and a devol linkage on it It rips out on the trails around AZ she’s as clean as a 2020 250x

How’s your air filter maintenance

If you re balance the crank the big bore kits work much better, they won’t rap at all with a giant slug hanging on a light crank

Nice set-up. Yamaha makes great bikes - capable, reliable, and tons of parts and know-how available out there. Unfortunately the lack of factory e-start on the two strokes is a major downfall for those of us that beat ourselves up every weekend riding tight technical mountain single track. Estart is less of an issue on the higher speed, more flowy stuff, and if that's the type of terrain I was riding most of the time, I'd probably go back to blue. I started out on a modified yz250, but eventually switched to ktm and beta, and could never seriously consider a bike without estart again.

Good..👍 yz 250 x- 212

Damn this is beautiful, but good luck getting that air filter in and out

@Dirt Bike TV Hi Jay, I know it's not related to this video, but I really want to know if I can fit my KTM 300 XC-W engine inside a 2020 XC-W frame? That way I'll have the most updated chassis but still, keep the carburetor and not going with the TPI.

Where did he get the lighting coil from

What gearing on sprockets are you running?

im a huge yamaha funboy

Beautiful bike. Looks alot like my 2018 yz250, I dont have a charging stator yet. Battery operated head light from siccass racing in Michigan. I do use a motion pro coolant recovery tank, 👍👍 cuz it works darn good. Just got a 13oz flywheel weight and fasst co. Anti vibration handlebar inserts. Hoping the inserts are like magic lol.

What headlight is on there?

What Ducati stator is he using

Where did you ge the yz 250x graphics I can't find them anywhere? Also where did you get the wr headlight I can't find an oem one

The oem cylinder doesn't have the transfer port aera to support power at high rpm on a 72mm, 295cc bore. That's why they all feel flat up top. About 68 or 69mm bore is all they can do. So a 250/265 beats a 295.

What final gearing is used with the full WR transmission?

What kind of grip heaters are the best!

How does the yz426f gear ratios differ to that of the stock yz250x? I've got a yz250x and I've been wondering if its possible to alter 4th and 5th. If I could bring 4th closer to 3rd and 5th closer to 4th it would be a perfect bike. Any opinions would be appreciated, cheers

How did you roll start it with a Rekluse clutch?

The DEKALB graphics add 3 HP...

Are the fi two strokes better on fuel?

I only wish that 2 strokes were street legal in today’s world. This is a very nice conversion!

2:11 talk about a pain in the ass air filter change

Wonder how many total hours are on it

Is that silencer big enough? Holy cow.

Yamaha needs a light

is 208 F good temperature for the bike?

I was gonna say the same thing about the electric start if he could only figure out a way to get that it would be the ultimate yz .

What light is that

My first mod would always be a hydraulic clutch 👌

Ultimate quality machine compared to some. Smoking he says , no idea ongoing. Ktm have stator failures for a decade plus from the factory. Know The Mechanic is a reputation earnt .

Already a 250 two stroke that comes standard with electric starter and kick starter, radiator fan, oil injection, full ights/signals, lots of billet parts, great suspension, electronic dash, race pipe, etc. Only $4400 brand new. I own one. Fantastic value and bike. gpxmoto.com

You can tell Jay isn't much of a fan of Yamahas 😂

Even a few ktms , he says haha they are king for boiling over, we need Ktm tea bags lol where we ride . A few recent model 2t ktm run hot due to dodgy reeds and box stock no hill required. Chase jetting turns out a chinese style reed box and reeds stock brand new on a ktm . Ktm thermostats another part that is poor quality.

*KTM ------------ COUNTER BALANCED ENGINE - THIS YZ WILL VIBRATE FILLINGS OUT OF TEETH*

He would have spent way to much money and time on this