Yamaha WR450F throttle stop removal mod - free mods wr450f & wr250f

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Let your Yamaha WR450f and WR250F use full potential by performing this throttle removal mod. You are going to get more throttle movement and will be able to rev much higher than before. This is on of the free mods that will uncork your dirt bike Yamaha wr450 and WR250.
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wr450 uncorking
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wr450f throttle stop removal mod

[@bikersoncall]

7:10 When you get ready to cut your bolt, (if you haven't bought the shorter yz bolt), put a nut on the bolt spun all the way down before cutting the bolt. When you get the bolt cut, backing of the nut or removing it from the bolt will assure that the threads at the end of the bolt are somewhat cleaned, then you can use a fine file, to knock the resulting chip or burr off of the bolt. Otherwise, when done cutting the bolt, you can sometimes just flat-file perpendicular to the bolt and get the starting thread about right, clean.

[@bigredd5171]

Great tip!

[@davelennon2593]

So after a couple of weeks of watching dirt and iron, i got MOTOvated and I bought a 2005 WR450F off of Gumtree (our craigslist), i have started pulling it down, and I used this video when pulling the carby out today! I have bought the JD jetting kit and will make sure i do all of the free mods from the other videos. Keep up the great work Rado!

[@dirtniron]

cool Dave, you are going to like the power now! Make sure you are not lean, i used one needle and bike ran fine, but I felt its not 100% so then I switched to rich needle and it felt amazing.. its usually spot on, but some small fine-tuning can make it even better sometimes

[@lolibumba]

Oath mate, I’m picking up my 06 wr450 in a couple days, fuckin keen, for it off gumtree too

[@bikersoncall]

Midroll Ads :FACEPALM: No one lets them run, they drive traffic away, lower retention scores. I let opening and closing ads run, and end any vid that has midrolls.

[@korruptusextremis]

Hello can you show how to remove the muffler canister? I don’t want to hammer it unless it’s necessary, thanks so much !!!!

[@raimoanalarsos2758]

Hi, i ‘ve got electric problem with my 450 wrf 2011. Whar are the color Main key switch to plug

[@MrMarkpark]

Did you actually have to take the carb off? It seems like you could change the bolt with the carb intact.

[@NirHason]

Gold bro! pure gold for WR owners :) Great video! Your channel is one of few that I really check everyday to see if there is a new video.

[@dirtniron]

Thanks bro, I wish I can help out gasgas 125 owners as well. ;)

[@killerkork]

Me too, Rodo keeps me moto-vated. Keep up the great work buddy !! I'll be snagging up one of those sweet shirts soon !!

[@NirHason]

Haha...I hope to upgrade soon to KTM EXC250 2017/Beta RR250 2018/GasGas EC250 2018

[@randallcarlton4562]

Great video, thank you. On a separate but related matter, have you encountered any TPS issues? My 2011 WR450F has been stuttering at higher speeds when applying a stead throttle. There are no issues going through the ranges, just when attempting to hold a steady speed. In my research I see that this is somewhat common with WRs. Some guys suggest it is a carb port or adjustment issues, some say unplug and run without the TPS connected, and others suggest replace and recalibrate the TPS. Do you have an opinion on this?

[@dirtniron]

havent had any issues with TPS so far, try to research some forums

[@josiahbennett6612]

Did you figure that problem out? My 06 does the same thing when trying to hold steady speed

[@michaelsilva2310]

Randell Carlton, any luck discovering TPS voltage on 2011 wr450f?

[@randallcarlton4562]

@@michaelsilva2310 as it turns out...carb jetting was the issue. i'm at 5,500 feet and so once i installed the JD jetting kit with the elevation appropriate main jet and needle position, all is well.

[@Thornicide]

My throttle cable gets stuck now after re install, any idea how to fix it?

[@6Twisted]

Damn they don't make the throttle easy to get to do they 😅

[@tedreed8084]

One can check for full opening of the throttle slide buy putting your finger in the intake after removal of the air box rubber boot. When the throttle is opened all the way you shouldn't be able to feel the slide in the throttle bore.

[@dirtniron]

thanks for sharing Ted

[@starlord6593]

Ok can u help me. I'm trying to find a replacement screw to put the stock one back in my 450? Can u give me the size and measurements? Thanks

[@dirtniron]

Look up the oem specs on it. I don’t have the measurements

[@NEFloridaDirtRiders]

I guess this mod doesn’t work for the 2021 WR250F 🤔

[@dirtniron]

there is a throttle stop n your throttle body, I have 2019 WR450 video showing that.. i mention it here and you can find another videos with the detailed explanation kzbin.info/www/bejne/kIC9Z3x3h7OAm8U

[@Clayton99Romero]

Do I need to remove carb to change out the stop screw

[@orlandomoreno5827]

Hello, I'm a follower of your channel, buy a WR450 F year 2005 and I'd like it if you can only add the subtitles in Spanish please. I would really appreciate it . Thanks and greetings from Chile

[@robertwoods2505]

Thanks for educating me my friend. I never even knew anything about a throttle stop...lol

[@dirtniron]

Any time!

[@hdan1867]

Great video!!! Like how you explain these things in a simple way... Any chance where I can find a video on the TPS adjustment of a 2006 WR450F???

[@dirtniron]

thanks Hans, glad you find it helpful.

[@bigredd5171]

Just now seeing this video. Can’t wait to check my carb. Really enjoying your videos. 2012 WR 250

[@o.j.z5285]

I've just picked up an 02 wr250 runs and rides great but does cut out under full throttle, is it possible it has the throttle mod and not the grey wire mod? I haven't looked into it yet

[@sendit1158]

I like the vid before I even watch it , i know its gonna be a great vid so i just go ahead n thumbs up

[@dirtniron]

I appreciate that

[@MemeRider]

What happens if your throttle stop is removed fully? I took my carb off and mine is missing, and the AP gets stuck behind it

[@dirtniron]

you need one, get the bolt that fits or order one OEM online

[@dreamsimp2334]

I need help with my 2022 wr450f. Can you help?

[@dirtniron]

How can I help?

[@brennonballard7995]

Is this bike fuel injected ? I have a 2015wr250f and it’s fuel injected I’m pretty sure and so it dosnt have a carb

[@dirtniron]

this is the older model with carb

[@brennonballard7995]

@@dirtniron I’m trying to figure out how to take mine off

[@kjwaymack4579]

does the 13 wr250f also have this longer throttle stop screw

[@SuperTelecom]

I like your videos man, good tips for beginners. I can't speak for other countries but I've bought 3 new WR450Fs over the years in Australia (03, 06 and 2011 models) all from different dealers and handily the grey wire throttle stop and airbox restrictions were removed by the dealer. All I've had to do with them was add a JD kit to the carb and an aftermarket exhaust system. I also put a YZF exhaust cam in the 2011 model. That bike in particular is a beast.

[@dirtniron]

Thanks brother? Seems you love those wr's ;). What is it that makes you stay with wr for so long?

[@SuperTelecom]

@@dirtniron I've just bever had any problems with them, I do frequent oil changes which makes a big difference of course. I put a new top end and cam chain in my 06 a couple of days ago and it was the stock piston and rings I replaced that had done 32,000km. Most of my mates ride and they have had various KTM, Husqvarna, Honda, Suzuki, Kawasaki and Gas Gas enduro and MX models over years and they never lasted as long as the WRs did, especially the Honda CRFs. I just haven't had any reason to change, when the WRs wear out or I sell them I don't know what I'll get, the 250 and 300cc euro enduros KTM and Husqvarna make are very nice to ride.

[@xterrential]

When I was at the Yamaha dealership today I sat on a new 2018 wr450f and I swear the throttle didnt even go 1/4 of the way.

[@dirtniron]

Yep, efi has long throttle stop as well.

[@markfredasilo3527]

nice

[@ashpardy180]

So I'm starting with the free mods on my 2019 WR450f, air box bong removal, throttle full range and remove air restrictor insert from oem exhaust . Question I have...will this change cause the engine to run too lean? Too much air and not enough fuel? Next question I have...without having an aftermarket exhaust is there an advantage to get the gytr competition ecu? Looking to have performance but dont want to see fuel usage go crazy. Thanks btw...great vids

[@dirtniron]

I am not sure about the lean bike after the free mods but it’s possible. I highly recommend to get gytr ecu, the bike will run way better and will have correct fuel-air ratio as well.

[@KennethColeJr]

Does the throttle stop apply to the new fuel injection models i know the grey wire isnt you can just get the gytr ecu

[@darrenporter4962]

Am looking at the moment for a wr250 or wr450 but honestly once the bike is brought it's not gonna leave me much cash left...so my question is can i uncork it without having to remap it? I can't afford the difference ECU...so what can I do that's free and will free up some power without going down the remapping route? Thanks any info really grateful

[@dirtniron]

throttle stop, air box restriction removal, exhaust insert removal,, these 3 free mods will help and you wont need to change the mapping. Check out this video, I am on 2019 wr450 with these 3 mods performed. kzbin.info/www/bejne/p3y8iIaDncyErNU

[@ronaldosombra]

Amigo qual a regulagem do parafuso da entrada de ar?

[@christophersnuffer1972]

i was thinking of buying a 2020 WR250F, does this bike have a throttle stop and exhaust plug?

[@dirtniron]

yes i think so

[@killerkork]

That bike is clean, what a good snag !

[@dirtniron]

thanks man

[@tiagocmb13.]

The video is very good. I bought a wr f 450 f 2005 last week and I'm having problems with it. It has pieces that are not original. the hoses in the rear reservoir where the radiator fluid is released, can you make a video showing where they fit?

[@dirtniron]

I am sorry, I sold the bike several months ago, you should be able to google it

[@wadimor4749]

i love yamaha wr 250/450f go rilis to indonesia

[@mikebarger3563]

@Dirt N Iron I have this same carb that I've re-jetted to fit my Suzuki DRZ 400 SM. Do you know if the fuel inlet elbow will come out easy to where I can point it towards my fuel petcock for a more direct route on my bike and the fuel line routing?

[@dirtniron]

sorry Mike I am not sure, I did not try it

[@johnwwest8407]

2001 WR426F - If my throttle rotates about 1/4 turn, would you agree that this mod has already been done?

[@dirtniron]

probably yes.. does it hit rev limiter if you go full throttle ? if yes then you are good to go

[@johnwwest8407]

@@dirtniron I'll have to check tomorrow, thank you

[@dadidraper113]

Hello buddy, Do you know for what the wires are which are next to the carburator? I think they come from factory unplugged, and you have them unplugged too.. At 3:19 you are moving them to the side... Thanks in advance and greetings from serbia and switzerland :-)

[@dirtniron]

I unplugged them because I was removing the carb, thats for throttle position sensor I believe

[@dadidraper113]

@@dirtniron yeaa, asked a good friend of mine and he said the same.. thanks buddy!

[@renedelafuente123]

I would love to do this modification to my wr450, but I don't have the patience and if things don't go as planned I start breaking and throwing stuff. Maybe if I was getting paid like you I would have patience but no looks to delicate of a job and little screws can get lost quick, but thanks for the video. Keep'm coming, love riding though.

[@dirtniron]

haha, you just need to take it easy.. ;)

[@garyshay6674]

one modification that I've yet to see on YT is disconnecting the ERG pipe that runs into the airbox. It cured the high-speed miss on my wr450.

[@dirtniron]

my bike was 2004, they did not come with that stuff

[@jasondennis230dennis2]

a nother cool video keep them coming brother.

[@dirtniron]

Thanks bro

[@trenthuffman5421]

What's the best way to adjust how lean it is. Fuel air mixture screw?

[@dirtniron]

thats just fine tuning of your idle and little bit off idle.. but to adjust whole range of throttle opening you need to play with jets and needle

[@EasyRieze93]

Your videos are helpful 💯%

[@desertchris]

I got to say thanks I reference this video all the time

[@dirtniron]

You are welcome, glad it helps

[@alexkyrkopoulos9480]

does this throttle stop mod and grey wire goes for the 2012 injection too??

[@dirtniron]

there is throttle stop on injection as well. for timing and ignition curve you need to get gytr tuner with different maps .. as far as I know

[@rowdyhick1525]

Why not just completly remove it and silicone the hole???

[@dirtniron]

you need the stop, I dont think its good idea to run without it

[@arshamparsia4014]

Great video really useful. Do you have any videos regarding set the float level on wr 450f?

[@dirtniron]

glad it helps. No, not yet

[@mojaveadv7135]

What years of the WR450/250f are good? There's a lot of used one for sale in So Cal.

[@dirtniron]

most of WR have the same mods, new AF models have grey wire connector in different location and are little harder to work on carburetor, but the mods are pretty much the same, 2003 and 2004 came without AIS, for other years you can use GYTR removal kit.

[@gerry343]

Why would Yamaha want to limit the throttle opening?

[@dirtniron]

Emissions and noise limits

[@rhyshumphreys6465]

I'm 15 and around 5 11'. I have a ton of downhill mountain bike experience so I was just wondering where I can get a cheap bike that would suit me. preferably less than £1000.

[@dirtniron]

I am not sure about UK, I get all the bikes on Craigslist in US

[@xterrential]

Do you want street legal or trail only?

[@rhyshumphreys6465]

Definitely prefer trail/track

[@SuperTelecom]

If you want something road legal for enduro riding your tall enough for anything out there, your weight, fitness and experience will make the choice. Just speaking for Yamaha models the more sedate road trail/enduros are the TT-R 250 and WR250R. Both of these are lower maintenance very reoiable bikes, make good power and would be easy to learn on and live with. With a 1000 pound budget I don't know if you'd get a WR250R for that but I'd say there would be lots of decent TT-R250s around for that price. Then you have the more powerful agressive WR250F and WR450F, these will probably be more expensive again and the 450 in particular is probably too powerful for a beginner. I'd be looking for a Yamaha TT-R250 or another excellent equivalent would be a Honda XR250R.

[@renerodriguez2940]

Can u do this on a rd200s I got the 2019....

[@rompgod9341]

Hold up wait a minute ima have to take a look at this now 😮 any other mods I should do to it to make it fast but still reliable

[@dirtniron]

all the free mods plus an exhaust maybe and JD jetting kit for carb, check my wr450 playlist . everything is there

[@brockhorsten2058]

What is the grey plug you took off cheers

[@corno]

Throttle position sensor (TPS)

[@BrokenSprocket]

Good job

[@dirtniron]

thanks mate ;)

[@brianhornsby9676]

Can you not take that bolt out while the carb is mounted?

[@dirtniron]

possibly, but its pain

[@Evil_Morty2000]

Just a suggestion,when you remove the carb,you disconnected electrical plug from it,don't connect it back,just tape it up with some electrical tape,apparently its a common mod also

[@Evil_Morty2000]

Oh and forgot to add,run the top breather hoses into airbox

[@dirtniron]

yea, I heard about those mods, so far my TPS is not giving me any troubles so I will keep it connected. For the top hoses of carburetor, my understanding is that by doing that you can get into mud and river crossings without sucking all the dirt in, is there any other benefit?

[@Evil_Morty2000]

Dirt N Iron yes,that’s what i think this is for,I just got this bike last week,it’s kinda a basketcase,so Im doing a lot of research while fixing all the issues with it,so all that info is pretty fresh to me

[@danielesicoli2106]

Hi, is the same procedure even for wrf 250?

[@dirtniron]

yes, same

[@danielesicoli2106]

@@dirtniron Thank you so much

[@roostertale9110]

So if the throttle stop is the stock length could you hit the rev limiter?

[@dirtniron]

No, it wont hit the limiter

[@roostertale9110]

Dirt N Iron so I actually took my carb out I have a wr250f and I have the yz one in it

[@davewalton7401]

Just got an 09 wr450. Thanks for all the tips

[@dirtniron]

cool Dave, I think you will love it, specially if you ride more of a open faster trails

[@nicknicky873]

Hey rado I wanted to ask for your opinion, I want to get a bike soon but I don't know if I should get the yz250fx or 450 version of it, I had a tt-r 125 not no long ago but I've been riding my step dads yfz450. Btw I love your channel and your goals towards it

[@dirtniron]

How do you feel on that yz450? does it feel like the power is too much or can you honestly enjoy it?

[@akathecanadian]

Junior Lara I think you should get a 250. We all could be using smaller displacement bikes but depending what you’re riding, if you’re doing Enduro offroad stuff, 250 would be perfect. No overheating, if you fall, it’s not 250lbs. If you’re doing desert roads and whoops at 40mph, 450. But if you’re doing technical, 250. - cost - If money isn’t a problem, then get a 450. A 4 stroke has tons of moving parts in the top end and can get really expensive, especially with a SOHC (single overhead cam). Parts for a 450 are generally more expensive than a 250. If money is really tight and you don’t want to spend $2000 on a rebuild maintenance interval on a 250/450, I suggest 2 stroke bikes. In the end you didn’t ask for my opinion lol, but when choosing a bike, it’s not an ego thing. Here’s a question for you. Are you riding a 250 cc 4 stroke to its full potential? If yes, buy yourself a 450 and ride into the sunset. If not, maybe even a KTM / Husqvarna 350. But ya. My opinion. Keep in mind cost of maintenance, riding ability, type of riding you do. Have a good day

[@dirtniron]

Great opinion Joshua, I wouldn't say it better!

[@killerkork]

A ttr 125 to a 450...I bet a 250 would be more enjoyable...I would recommend a 2 stroke !!

[@boelens2183]

Are you sure this is safe? Yamaha does not recommend removing the throttle stop.

[@dirtniron]

yes its safe

[@boelens2183]

@@dirtniron Thank you very much. Do you know if the throttle stop removed exactly the same way on a 2020 WR450F?

[@dirtniron]

its little different since 2020 is EFI. i suggest to ask dealer to do it for you, its very common thing to do.. good dealer should be able to help you out.

[@boelens2183]

@@dirtniron Awesome. I will just need the dealer to get and install the GYTR Competition kit before I make the trip to the dealer. Only the kit is sold out everywhere. I understand the kit is $150 and hopefully, the dealer won't charge too much for the installation. This would take care of the throttle stop mod and the GYTR kit mod since the kit comes with the shorter screw. This would only leave the air box choker mod and exhaust mod left. I feel confident enough to do the air box mod myself but, I still need to do some more research about the exhaust mod.

[@leafywatson249]

Bossman you sure no alot im learning something from you thanks man

[@dirtniron]

thanks man!

[@jacobbroske9051]

Will all the mods that you are doing to your bike work on the aluminum frame models too? like a 2007/2008 model

[@dirtniron]

yes they will, grey wire is located in slightly different place, otherwise pretty much the same. One downside of AF is that you have to remove rear shock in order to remove the carburetor.

[@akathecanadian]

Besides my friends at school, I got spotted at a gas station wearing your shirt lol

[@dirtniron]

Did they actually know what it is?

[@akathecanadian]

Dirt N Iron “DIRT N IRON, YEAHHH” he knew lol

[@dirtniron]

AkaComeau that's so cool ;)

[@killerkork]

Yeah, thats awesome...I knew this channel was gona blow up

[@nSFlights]

Would this be harder on the engine since it is revving higher?

[@dirtniron]

Those engines can handle it, they were made for it.

[@SnipingWithSkillz]

Does it really effect the bike if i dont do the grey wire? And why? Ive been runing my bike all this time without the grey wire

[@SnipingWithSkillz]

Without doing the grey wire mod **

[@dirtniron]

Silvester, my understanding is that once you open the throttle fully you are entering high rmp and WR ignition does not have proper timing for such high rpm. Engine is not working optimally, of course it would still run, but it is much better for engine to have ignition curve that was designed for high rmp as well. I read somewhere that till 6000rpm there is not much difference so if you stay mostly in that range you should be fine. here is what Yamaha says about it: The CDI unit is the same for both YZ and WR models. The gray wire matches the ignition map to the WR and its shorter throttle stop to limit RPMs. This is done solely to allow the WR to meet drive-by sound restrictions. By swapping to the YZ throttle stop and disconnecting the gray wire, the WR can now access the YZ ignition maps that allow ignition timing that matches the wider throttle openings. There is no lower rev limiter, per se, in the WR CDI. The limitation comes from the stock WR not being able to have its throttle opened completely. Disconnecting the gray wire simply allows the CDI to use the YZ ignition curves that provide high RPM timing advance not available with the WR's stock setup. Besides meeting the noise restrictions, the thinking is that the WR being a trail bike, most riders won't miss that high RPM capability. And those that do, well, it's there if you want it.

[@SnipingWithSkillz]

Is there a noticable difference in power?

[@sambumanglag6432]

Hey Rado' I just measured my throttle grip the exact same way as you did in video, I got 1-1/4 inches , is this as much as yours or should I be able to go farther? I do feel like it is need of more throttle range but not sure

[@dirtniron]

The best way to find out is to check if the slide in the carburetor comes all the way up, another way is to rev the engine and see if you hit limiter. If not reaching limiter, you know you have long throttle stop.

[@sambumanglag6432]

Hmmm okay that’s great advice ‘ I don’t recall ever hitting the rev limiter “ now that you mentioned it ‘ great advice I’ll try it sometime tomorrow. Thanks so much Rado 😎

[@davidesteves3848]

How do i know that I hit the rev limiter? Thanks

[@gloman4l151]

David Esteves your bike will scream

[@vpnmaster2872]

another good and useful video.

[@dirtniron]

thanks ;)

[@mxrider2strokebraaap54]

Nice video!👌

[@dirtniron]

thanks!

[@ironwolph]

Good video can't wait to do mine!

[@dirtniron]

thanks Tom, let me know how it feels once you do them all

[@Wide000]

Just to be the first one to do so, I put a like before seeing the video! :)

[@dirtniron]

thank you! let me know after you watch the video you regret it or not ;)

[@Wide000]

Excellent video, as always. This carburator is the same one that I have on my Crf450r. I bet mine is not restricted.... :)

[@dirtniron]

I think so :) thanks for feedback!

[@shawnkeene3370]

what is a turtle stop ?

[@dirtniron]

Shawn Keene :) I still struggle with some words, my little boy corrects me too. I will work on it, promise

[@shawnkeene3370]

I m kidding ! lol

[@ironwolph]

Where are you from anyways? Just wondering. Thanks for the help with my JD jetting kit I bought. Good video

[@dirtniron]

no problem Shawn! from Slovakia originally.