Uncorking Yamaha WR450F 2021

More enduro videos: stuntex.ru/en/magazine
We got new WR450F 2021 and had time to shoot uncorking, and comparison with 2020 model (separate video at our channel). Uncorking includes: throttle stop shortening, removing of intake restrictor (airbox) and exhaust restrictor (muffler).
After uncorking it’s recommended to upload new fuel map via mobile App. But there is no map for WR450F 2021 at official Yamaha’s website. There is map for 2020 model only which should not fit, because new WR has new cylinder head: combustion chamber geometry with steeper valve angles, more aggressive cam profiles, a higher compression piston with low friction rings, longer connection rod, larger exhaust head pipe connector. We decided to wait for appropriate fuel map.

[@karendietzler6746]

Probably the most well done how-to video ever. No BS commentary. Just Git-R-Dun. Bravo sir.

[@sagegategaming8022]

probably the worst video as he doesnt even go into the fact the bike needs an ecu change lol.

[@darrenwilson3732]

@@sagegategaming8022 How does it run without the upgraded ecu?

[@coryparker5729]

very true I did this to my bike and now it runs crazy lean and the header gets red hot

[@glossblack1098]

Great video. Tempted to get this bike soon. The emissions laws that enforce all this extra stuff on new bikes make no sense at all. In Australia, about 99% of Enduro/MX bikes get uncorked straight away by the dealer or the buyer, so its pointless having it in the first place. Even after uncorking, the emissions and noise is still way way less than a Harley, other road bikes, pick-ups, 4WD, SUVs, etc. Stupid rules, but good to know there is an easy solution.

[@Sanguine_Addiction]

I hear you about emissions. I just put a deposit on a 2022 YZ250X. But now my dealer is telling me that here in CA, 2022 off-road bikes will not receive red stickers and will be confined strictly to MX tracks. Now I know the 250X can handle MX tracks without a problem, but it's natural habitat is trails & off-road, and I don't want to waste money on a brand new bike if I'm confined to just tracks. So I figured I should get a CARB compliant bike like the CRF450X or the WR450.

[@carlosmedrano3549]

@@Sanguine_Addiction yeah I know it's all bs to I want a new bike but not sure what to get currently I have a 18 yz450f. I like the the husqvarna fx 350 but not sure 😕 my buddy works in a dealer and he mentioned to go for the husqvarna fe350 since i can get it with green sticker but can't find full exhaust. system for it only slip on muffler

[@Sanguine_Addiction]

@@carlosmedrano3549 I hear you brother. This new law pretty much forced me to buy a used bike. I ended up getting a 2017 YZ250X. At least I got my sticker so I can ride on BLM between October - May and on the MX tracks whenever I want. If C.A.R.B. ever gets their head out of their asses ( I won't hold my breath) I'll trade it in for a new one.

[@GooberNuf]

Although I don't have a 450, this video was really straight to the point and informative. 10/10

[@can_with_beans]

It sucks that modern motorcycles have to be pretty much neutered from the factory, but what's nice is that manufacturers make it (mostly) easy to fix. Like that intake restrictor was just glued on, not an integral part of the filter. Also nice video, straight to the point, 11/10

[@maxmartin-merrells3723]

So FREAKING satisfying!

[@kx501]

That looks so much better that a ktm, love the colour and shape!

[@BikerDarren24]

Brilliant video, very informative and straight to the point 👌

[@dreyn7780]

So, if you don't have a bike factory, shut up.

[@stanimirgg6044]

can u tell me how do u put on the front plastics im having a hedache with it

[@danieldossantos5299]

Did the same things on my 2018 model but also changed the CDI for an upgraded GYTR 😉

[@kostasoga]

hola queria saber si después de quitar el tope del filtro hay que acerla algo

[@charlieanyon5523]

So do I need the gytr ecu to work with this or will it work with stock ecu

[@kentfiremouse]

Do you need to do an engine tune after these mods? Excellent video!!!! No BS.

[@carfactorycustoms422]

what hello is u there with the backwards engine

[@brettdesnoyers3831]

Beauty demonstration 🎉 . That is a T25 for the throttle screw?

[@philoskill15]

Straight to the point!!! finally thank you

[@ScotianBlooded]

should you break the engine in before performing surgery?

[@neogen81]

Стильно, аккуратно, понятно без слов!

[@neogen81]

На выпуске сначала не понял, что заклепки высверливаете. На мой взгляд, надо было показать крупным планом.

[@muh.rekiii3734]

My dream bike :")

[@theslipperface]

They're far too heavy for hard enduro, but good for open stuff

[@adamplumtree64]

If you have a wife I can play with you can have my wr450 2019 as getting new one

[@adamplumtree64]

@@theslipperface not at all I raced the 450 the bike setup from box is mint not heavy at all am in the over 50 year old class aswell and have had wr45”s from 2017 to just got my 2021

[@kaimcdonald2460]

theslipperface I recon they would be mint for a supermoto

[@100868ful]

Great video! How much of the throttle stop screw did you cut off?

[@destryhesskew]

Just got this bike for Christmas. Suspension is a dream and power for days. I am dreading the first time I lay it over. Have it uncorked and next update would be the GYTR ECU

[@Stuntex]

Yes, it looks like the best bike in the class on the market)

[@daltonmckinnon7264]

Yesssss I couldn’t find this anywhere good job man! What size screwdriver do I need to get the throttle stop out?

[@willacademic]

tamper proof torx 25 or (TT25)

[@patrickm9366]

Anyone know if my Yamaha mt07 is corked??

[@rebarjabar4533]

How new is this matrix price?

[@frankphipps]

Awesome video

[@carlosmejicano8085]

Why is he doing that ? Can someone explain me please

[@sergeyboyko9831]

Таки что с картами после раздушки разрешилось?!

[@davidpolak1431]

We're can we buy this bolt

[@chajda111]

I love my 2021 👍

[@zzxx33mh]

✌️👍🎶

[@dawidos117]

Excellent job, guys 👍🏻 Great, simple, very helpful video. So... why is it corked in a first place? It’s really annoying.

[@Stuntex]

Probably, to pass some european market restriction.

[@dawidos117]

@@Stuntex silly EU laws 🤦🏼‍♂️

[@dreyn7780]

What's really annoying is you and your generation. You're the opposite to smart.

[@dreyn7780]

@@Stuntex the restriction is in your head. You're getting electric riderless anyway. Your bike will be banned soon.

[@luisminfla890]

Obligatoriamente hay que hacerle eso para que funcione? O se puede utilizar así como viene de fabrica?

[@eliminationgame]

Se puede usar como viene de fábrica! Algunos quieren más “poder” pero para mi como viene de fábrica es suficiente!

[@jorgegama3848]

What does cutting the screw help for?

[@rfhk6721]

100% Throttle

[@jakub151]

Did you remove the DB killer or was that just the spark arrestor?

[@Stuntex]

DB killer

[@user-qd9wp2hn4t]

Снимать ограничитель на ручке газа нужно после обкатки , или убрать ограничитель можно сразу?

[@Stuntex]

Сразу

[@8Aniol8]

Hey Bro, do you have to remap it after this is all done? Won't it burn to lean?

[@Stuntex]

No

[@8Aniol8]

@@Stuntex Thx bro, How much HP does it make after the uncork?

[@atkracing]

how much do you have to cut off the old throttle stop?

[@slivingston117]

Just the part that isn’t threaded

[@seatime674]

​@@slivingston117 just leave the bolt out and plug the hole with silicone or a black rubber plug from Home Depot

[@user-wr3fx3rz7m]

вопрос знатокам! ристрикторы на впуск и выпуск с ограничением открытия ручки газа ставяться для обкатки или таким образом производитель обходит экологические нормы?

[@user-wz3ph4iy6q]

Нормы.

[@neogen81]

обход норм, конечно. Иначе бы все то же самое было бы на версиях для кросс кантри и мотокросса.

[@Anthonysmith-ic8ef]

My Question is if you take all of that BS off of their won’t the bike run really lean because those don’t have an oxygen sensor in the exhaust so idk if i wanna burn up my bike

[@nickovdub6131]

any reason why you didn't just remove the entire tailpipe piece instead of just the little restrictor?

[@johnnylaw6817]

backpressure is needed

[@user-qd9wp2hn4t]

Подскажите сылку где найти топливные карты для настройки мотоцикла через смартфон?

[@user-ui7mg6nk6b]

тоже найти не могу..

[@vaughanscott7308]

Awesome best vid ever.

[@jamaljackson9879]

Hey brother does that remove spark arrestor?

[@johnnylaw6817]

no

[@Gameljc]

Is this going to be a sumo?

[@user-uy1qj8np3q]

И как он на трассе?

[@gehansachathu_5876]

Superb

[@kitajckitajci1628]

Забыли показать как поменять прошивку!

[@comps7315]

Does this make the bike run smoother in any way? Why exactly are we uncorking?

[@her8066]

gives it more power

[@WvMnts]

Thanks for sharing

[@jasonchristinecharest7595]

With all thos free mod ......the engine still have the good air to fuel ratio......i mean the bike will still run like a charm?

[@Stuntex]

Yes! But it's better to upload new maps for higher efficiency

[@marshmeloalaoui8208]

le prix

[@raphaelmesquita2076]

Para que serve tirar essa peça em baixo do filtro de ar ?

[@coryparker5729]

More air

[@user-qd9wp2hn4t]

Здравствуйте. Купил новую WR 250, 2021 года, подскажите пожалуйста через сколько тысяч км нужно менять масло? И какое лучше лить Ямаховское или мотюль?

[@user-wr3fx3rz7m]

замена масла каждые 10 моточасов

[@user-pu9tg8pd1g]

Байкер как у вас там ямаха катаете? Сколько интервал между маслами в двигателе? Сколько уже проехали? Тоже стал обладателем такого аппарата..

[@AllanSmith859]

Will these changes make the bike run like a FX?

[@Stuntex]

WR has another gear ratio. And engine tuning should be different.

[@GabrielFernandes-te2jw]

E meu sonho desde criança quando eu vi uma

[@user-df5qs6bw2v]

Понятно и доступно, осталось настроить инжектор под новые параметры. Вот тут будет многое непонятно и многим недоступно

[@Boonus18]

I wish Honda had the balls to make uncorking their bikes this easy.

[@chippychomper4294]

What dose uncorking do and can you do it to a wr 250f

[@NEFloridaDirtRiders]

Yes you can do the very same mods to the WR250F. Uncorking the bike gives you a greater amount of otherwise unavailable power.

[@Toxic_-wv4zz]

@@NEFloridaDirtRiders if I uncork my WR250F… Will I need the GYTR competition ECU? I definitely do not want to hurt the motor

[@NEFloridaDirtRiders]

@@Toxic_-wv4zz The ECU compensates for the additional airflow but if you’re not going to upgrade to the GYTR ECU then I don’t really see any real advantage in making the modifications.

[@TarasIvanov686]

Фильтр воздушный для чего эта флейта поставлена заводом тогда?? Просто убрать и в чем смысл?

[@neogen81]

Это мотоцикл двойного назначения. Он должен выполнять определенные нормы дорожных транспортных средств по экологии, звуку и т.п.

[@oleggkon5182]

Парни...не блудите в мыслях)))...заглушки - это для обкатки!!! Ямаха,наверное - единственный производитель, который рекомендует и подробно описывет как обкатывать новый мотоцикл!!! Скорее всего, то что мы видим на видео, описано "пошагово" в мануале)))

[@neogen81]

@@oleggkon5182 а кроссовый мотоцикл не надо обкатывать?

[@johnpucko7128]

Do you need to do anything with the ecu/mapping?

[@dec6211]

After uncorking it’s recommended to upload new fuel map via mobile App. But there is no map for WR450F 2021 at official Yamaha’s website. There is map for 2020 model only which should not fit, because new WR has new cylinder head: combustion chamber geometry with steeper valve angles, more aggressive cam profiles, a higher compression piston with low friction rings, longer connection rod, larger exhaust head pipe connector. We decided to wait for appropriate fuel map.

[@brandonstow1330]

@@dec6211 Hi Jimmy, nice comment, its actually helpful. So im looking into getting a WR450 f 2022, IF i uncork it do I need to waste money on a new ecu and remap that way or can I do it simply by using the power tuner app? Also, what map would you recommend for this? They have uploaded a few more since!

[@sonikpaster86]

Привет! После покупки можно сразу убирать ограничители или это для обкатки?

[@Aleksandr_Agronom]

Вообще для обкатки. Но можно и убрать всё сразу и ездить с умом по началу.

[@Stuntex]

Где Вы нашли информацию, что для обкатки? Это не так. Ограничители для норм ес, тк эндуро сертифицируются для ДОП, в отличие от кроссовых байков.

[@sonikpaster86]

@@Stuntex kzbin.info/www/bejne/jZSVaoh6gp5mbLM на вашем канале

[@Aleksandr_Agronom]

@@Stuntex что-то я сомневаюсь, что ограничитель заслонки для ДОПов ограничения. Ф

[@Stuntex]

Хе, старое видео) На кроссовых мотах нет никаких ограничителей. Это для сертификации делается.

[@JacobSnover]

Did you change the mapping after doing this?

[@Stuntex]

Better to do this. When we made the video there were no maps for this model at yamaha website.

[@JacobSnover]

@@Stuntex Makes sense, I'm picking up a 2022 WR250F, and have been looking into doing this. Thanks for the info!

[@brandonstow1330]

Hey man looking at doing this, did you ever get round to doing it and what was your experience like? Was it easy? Did u need a whole new ecu?

[@donbrashsux]

Just Awesum

[@JamesM0M]

Can you remove that whole inner piecer of the exhaust where the allen heads are? Or not recommended?

[@Stuntex]

You can, but the end of the muffler will be covered in soot

[@justinfisher8749]

Same process with the 2024?

[@chrismoulds7988]

Here wondering the same thing, also wondering if it needs a tuner and dyno after something like that

[@_WebersWorld]

I recommend atleast getting a yz450f exhaust makes a big difference as i did with mine!

[@vipereir7]

Are the same in the assembly .,? Yz450 2021 to Wr450F 2021,?

[@jimbo4203]

I just bought the yz 450f and put the heaviest flywheel on it i could get , full fmf megabomb exhaust, she's a ripper !

[@_WebersWorld]

@@vipereir7 yes

[@vipereir7]

@@jimbo4203 Was it a bad investment? Is it better OEM?

[@jimbo4203]

@@vipereir7 I've loved the yz 450s since my first 07' ! Super fun , fast and reliable. If you need a light the wr is great too .

[@bowiebowmam4832]

Is the same with a wr250f

[@Stuntex]

Yes.

[@hmgfhmgh7032]

Всех с наступающим, новым 2021 годом!

[@user-rk1yc7sp4l]

Ну, а рассказать об ощущениях до и после раздушки? Сильно изменилось или так...

[@user-wr3fx3rz7m]

там нечего рассказывать. задушенный он вообще не едет. газ тупо на половину открывается.

[@Byvalyi.VovseNeUser]

Задушенный ,с газа на второй передаче ,поднимался.Ну и максималка была 110км.ч

[@user-wr3fx3rz7m]

@@Byvalyi.VovseNeUser не поднимется он с газа задушенный. только со сцепления и с хорошим рывком на себя. может он был «полузадушенный». я не однократно сталкивался с ситуацией когда не шаря люди снимают только ограничитель открытие ручки газа, про рестрикторы вообще не знают что они там есть.

[@Byvalyi.VovseNeUser]

@@user-wr3fx3rz7m ,был у меня wr во владении три года.Абсолютно новый,из коробки.Но речь об 2007мод.годе,поэтому карбюраторный. Газ точно так же открывался менее чем наполовину.+Душилка стояла на впуске и на выпуске. Повторюсь:С газу вставал на второй передаче

[@hornor100]

Если б замерить до и после, насколько поднялась мощность?

[@Stuntex]

Смысла замерять нет. С ограничителем ручки газа заслонку открыть нельзя.

[@Justin-ml8qc]

Good vid but wtf, how many suggestions are you going to give me??

[@GabrielFernandes-te2jw]

Eu queria ter uma moto dessa só que mini mini moto da metade do seu tamanho

[@user-ec7vd6qx6l]

Зачем под воздушным фильтром деталь снимать?

[@abhiramaarun8885]

Super

[@user-gq3wc6wc1t]

Сколько стоит 21год, есть ли наличие, какая цена, в каком городе?

[@CasperWRX]

811 тр в мск - есть пару штук

[@Podolskvideo]

уже 870тыс.

[@anthonysassine7597]

Nice

[@bretheluvy7219]

Hello

[@user-hf1bd9ct1y]

Akrapovic или fmf?

[@user-wr3fx3rz7m]

FMF kzbin.info/www/bejne/d36UdXqIm6tkmJY

[@danieldossantos5299]

It's just a matter of taste but the FMF has better price $$$😉

[@zain_op_11]

Love from Pakistan 🇵🇰 (Lahore 🥰)

[@sebastiandonkey8618]

Bomb

[@user-bu9lp3tr1x]

И ты не девочка теперь 😂

[@Bucks1]

Can someone explain to me the point of everything he did in this video? I'm really confused.

[@evanwilliams6352]

These bikes come "Corked" from factory, for emissions and other reasons. They have a throttle stop which only allows about 30% throttle, a baffle in the air box and a baffle in the exhaust to tame it down and quiet the bike, but ultimately loosing a lot of power. This video shows how to remove all those restrictions to help liven up the bike.

[@Toxic_-wv4zz]

@@evanwilliams6352 after uncorking, is it necessary to change the ECU to a competition version?

[@evanwilliams6352]

@@Toxic_-wv4zz yes I would highly recommend it. With the factory ECU, the bike would think that it's still receiving less air, giving less fuel. But in reality it would be getting way more air than before, so the bike would run lean. You don't need the extra stuff though. The ECU comes flashed from the factory with a "mild" and "wild" map. buying the switch opens up the option to switch between the two - I think its set on "wild" from factory (good idea to get the switch - but not necessary) and the WiFi module lets you tune the bike with your phone. (really cool but not necessary for uncorking) I rode mine for 10 hours "corked" before I had the ECU to uncork it. Being honest, I'd say x2 more power and 50% more torque than before.

[@dodo19923]

@@evanwilliams6352 The fact a motor company sells bikes with throttle stops that aggressive is beyond me. I can understand the exhaust baffle and even the o2 sensors but restricting the throttle that much just seems outright dangerous. At least yamaha make it easier to pull apart than the honda's do (looking at you crf300l).

[@monkeybeaver626]

@@dodo19923 it has to do with regulations, and I'm assuming that they have to restrict the motor down with the throttle stop to meet some kind of emission standard. (less throttle, less air, less fuel out the pipe) Because this bike is sold as an "off road" or "street legal" outside of the US - instead of "closed coarse" they have to meet those regulations... I know, it's dumb.. and you can likely blame California for it... but at least it's very easy to remove the restrictions.

[@wiertacze2858]

Do you think that unlock throttle is safe for engine ?

[@Stuntex]

Yes

[@nickovdub6131]

Trying to understand, what exactly does it do? Give more throttle input? Or just allows the engine to rev faster by allowing 100% open throttle?

[@Jockmystilo]

epic!!!!!!!!!!!

[@user-us3fm2xm6y]

👍👍👍👍👍👍

[@Andrey_Bezfamilii]

Сейчас ямаху в Китае что ли производят, что это за херня вместо воздушного фильтра?

[@zzxx33mh]

First I ll do 4 my 2021..

[@juliandp1768]

No fuel tuning?

[@Stuntex]

No

[@anthonymargala6199]

@@Stuntex how long did you run the bike without an ECU upgrade? No issues?

[@222wheelsdown]

Hi can someone explain why MX bikes are not corked and yet trail bikes are? I’m looking to trade in my very first motorcycle that I have now (ktm 390 adv) for either this Yamaha or a CRF450X. I’ve heard both are considered trail bikes though therefore come corked? Is that all 50 states, I live in AZ? Why make it corked if it’s not even road legal... I could see this applying to dual sports like the crf300l. Is there anyway I can buy a newdirt bike (not MX bike) that I can just ride around trails/ desert and doesn’t come corked? Preferably a 450..

[@Stuntex]

Because MX bikes are used at tracks only. Enduro bikes are homologated for public roads and should pass emission restrictions.

[@mr.gicher]

👍👌👏

[@regisbelini9649]

Top.....

[@donbrashsux]

Oh no you got rid of the bong ...

[@konstantinyakovlev2983]

Информативное видео! Ссылку можно на прошивку, все мероприятия выполнены осталось прошивку залить Yamaha WR250F2020.

[@user-ur2fh6kn7v]

Нашли прошивку?

[@konstantinyakovlev2983]

@@user-ur2fh6kn7v на данный момент нет, сказали в приложении можно менять настройки двигателя, осталось разобраться в этом вопросе, готового решения пока не нашёл.

[@CasperWRX]

@@konstantinyakovlev2983 готовые решения от производителя и юзеров в приложении - грузятся по вифи с телефона

[@user-pu9tg8pd1g]

@@konstantinyakovlev2983 бро разобрался с прошивками?

[@user-ys1xh5eq3p]

Понятно и без слов.

[@waynejohnstone3685]

That music is oddly familiar…

[@krannie1]

You can't de-restrict without chaning the ECU and the mapping, or it will detonate and run extremely lean !

[@vaughanscott7308]

Dam good point.

[@EnduroUK.]

You can map them on your phone lol

[@seatime674]

So just do everything in this video plus add the $200 Gytr Ecm correct??. Does the bike do its own mapping after that or is there something else you have to worry about after you plug in the ECM?

[@johnnylaw6817]

wrong

[@user-fc8ml6cw8s]

ជិះទៅអង្គវត្តកប់ម៉ង

[@user-bx2ov4mr2l]

👍👍👍👍👍👍👍😍

[@robsonenduro3316]

what's the point of this stupid emission regulations...

[@antonioturcinov2016]

moze poz

[@PennsylvaniaEnduroRiding]

REady to Rip!!

[@selfmader_8023]

А пРоговорить !?

[@Frisky_FZR]

They literally flipped the engine wtf