How to change gearbox oil on 2 stroke dirt bike - KTM 250 SX

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Step by step tutorial on how to change gearbox oil on 2 stroke dirtbike KTM 250 SX. I talk about oil I use, tools for oil change and some important things. Oil change is critical part of dirt bike maintenance, keep doing them regularly and your dirt bike will run for long time. Its always safe to follow intervals from your owners manual. Good luck guys!
/ dirtniron
/ dirtniron
dirt bike gearbox oil change
dirt bike maintenance

[@OBSBryce]

Really loving the vids dude! So much so I bought a 07 250sx today. Now I must watch all of them to make sure it’s ready for some trails! 🤙🏻

[@dirtniron]

congrats man, thats great bike! I am currently building ktm300 using 250sx check out my latest videos, there is way more to come.

[@jeremiahulmer6329]

You really are one of if not my favorite KZbinr. Your videos are great and you update your content as you continue to learn new information.

[@dirtniron]

+Jeremiah Ulmer thanks brother!

[@peteschiavoni5069]

Love your videos. Keep them coming.

[@dirtniron]

thanks Pete, I will!

[@odanne29]

Good video like always man..

[@KingJamesVL]

Great channel btw! Thanks for the videos!

[@dirtniron]

+KingJamesVL thanks bro!

[@_cleansext]

I love your videos

[@vaneater2734]

Sitting on my bike rn watching this.

[@dirtniron]

thats the best way to do it! ;)

[@FrostmoonPlayz]

Lol same

[@LeandroFerreira-lk9sm]

Great video bro 👌👏 keep the good work 👌👏 I love watch your videos makes me feel motovated and also i can learn things about dirtbikes that i didnt knew. I will start this Tuesday my lessons in the driving School to get the 125 cc motorbike license to start my dirtbike journey 💖😍👌 Keep inspire people and motovate them like you did with me 💖👌👏👏

[@dirtniron]

+Sky Avenger that's great, I am so happy to see your motovation! Good luck bro!

[@tbank86q]

I've been using Rotella T 15/40 for years. It's fantastic and cheap. I use it in my street bikes and numerous other applications. I change it in my 02 kx250 based on what it looks like. Probably closer to 10hrs than 20, but I do a lot of slow, technical, enduro style riding with a lot of clutch slipping and like fresh oil. Love the Motovation!

[@dirtniron]

+Tbank86 thanks for sharing bro. I think 10 hours is good, I do 20 at the most. I do only trails o my KTM, not very hard riding.

[@ninjaarcades7356]

@@dirtniron ok 15/40 is ok for 2 stroke to i just bought ktm250 exc and looking to oil change now

[@commiekiller6974]

I have a 2003 250sx as well very underrated bike my favorite bike ive had out of 12 total bikes

[@supremepictures6243]

That STAY MOTOVATED makes me feel so warm and fuzzy great video

[@dirtniron]

Glad you like ;)

[@driftzii2575]

Nice vid pretty helpful for new riders

[@dirtniron]

thanks bro!

[@373737bandit]

Excellent vid bro

[@dirtniron]

+373737bandit thanks brother!

[@ZSharkPH]

Great Vid... It's so cheap and easy to do. I change mine every 2nd or 3rd ride.I need to get a magnetic plug thou :)

[@dirtniron]

+Z Shark yea, that plug helps for sure

[@KingJamesVL]

2nd or Third ride. Man..your throwing $$ down the drain. Unnecessary to change it that often unless you’re professionally racing...to each their own though though.

[@jeffreymoran6234]

@@KingJamesVL better safe then sorry bro i have the same KTM and i change my oil every 3 rides and i run my oil mix lean i would rather change a sparkplug them a piston and rings i love these bikes there so easy to work on the newer 4 strokes,you dam near have to bring it to the shop to get fixed.

[@MA-hw5xh]

Every 6 hours is almost every weekend for me. On my 350 ktm I change oil and filter every 25 hours, working perfectly fine with 380hours from 2013. I use motul 7100 Btw good vids man! Cheers from Barcelona

[@dirtniron]

Sounds good Marc. do you have enduro model or SXF?

[@MA-hw5xh]

Dirt N Iron enduro model. Well it’s husaberg, ktm with husaberg plastics

[@dirtniron]

thats a nice bike, I always likes husabergs, I used to have 570 before

[@Nateguy632]

Really nice thank you!

[@dirtniron]

thanks Nate!

[@jaimeolmedo7413]

Thank you very helpful

[@dirtniron]

Welcome, glad it helps 😉

[@mogan23z]

What are your thoughts on using transmission specific oil instead of 4t engine oil for 2 strokes?

[@dirtniron]

you mean to get oil designed for 2 stroke transmission? I think thats fine, but little expensive if you do your oil change often.

[@Crazyfornayeon]

we can use diesel engine oil?

[@kalleankaa7536]

Old video. But yeah, i see youve got an 03 250 sx. Very wicked violent pull on all gears. Never stops pulling. Had one of these, had fresh piston rebuilt and boyesen pro reeds. Changed to doma pipe and silencer... wicked bike. Try 06 piston if ever, it has double rings instead of single.

[@Catman1987]

Im curious , i accidentally added a liter of transmission fluid in my case on my 99 kx 250 , amd rode it a lot ,whats the worse that can happen ?

[@billybull7419]

@Blake VanDamage uhh ohh

[@NirHason]

Very nice video, simple and straight froward. 6 hours?? on my Raptor 700 I do oil change every 30 hours (and my friend on his YZ250F every 10). I will be broke if I'll do it every 6 hours haha. We don't have Rotellat here in Israel (as long as I know) so I'm using other known brands which are pretty expansive (so 6 hours is not an option for my pocket) 24$ for 1 liter (Full Sync).

[@dirtniron]

+Nir Hason that's pricey. I pay around $3-4 for oil change. If I ride MX I keep 6 hours, for light trail riding I think 10 would be ok too.

[@NirHason]

I heard about that Diesel oil is heavy duty! Didn't try that though. I'm using for my 2T Valvoline SynPower oil both for the fuel/oil mixing and for the trans/engine oil (10W-40) . For the Raptor I'm using YamahaLube

[@jesse6431]

Hey man I don't know if you still reply but I had a few questions 1 are clutch and transmission oil the same 2 what is the 13 mm drain plug on the other side of the bike(I have a 2004 sxs) And lastly where can you find the amount of oil you need to put in if you have no manual or if you can't find it on the bike? Greetings Jesse

[@ericbradford4429]

Clutch and trans fluid are different oil. And you can download almost any manual free online.

[@maleahkekoa6409]

I have a rmz450 just like you I found metal shaving in oil filter do u know what could that mean? an how do I change gearing oil?an last but not least I want to upgrade my 450 more for trail what can I upgrade for better trail ridding?

[@dirtniron]

that can be from transmission or some other parts, it happens sometimes. Make sure to have frequent oil changes and clean your strainer too. RMZ has only engine oil that runs in gearbox as well, it doesnt have gearbox oil. for the trail upgrade, play with the gearing to suit your style, depends what kind of trails you ride. get some skid plate and hand guards (wrap around are best) maybe consider magura hydraulic clutch conversion, if you clutch a lot. higher psi radiator cap so the bike wont overheat easily, 18 inch rear wheel will give you much better variety of offroad tires, you can get really fat tires for better traction on different terrain. It depends how hard you ride, but protecting your key components is always a good idea, linkage protector, radiator braces, caliper and disc protector, etc.. if you have extra $ to spend maybe consider rekluse clutch as well... good luck bro!

[@maleahkekoa6409]

Dirt N Iron Right on ty for the info really appreciate it

[@RaksasaMentawai]

Had to backtrack brother man, just bought me a 2007 exc 250 2 stroker 🤪

[@dirtniron]

Cool Rodney, welcome to the club ;) how do you like it?

[@RaksasaMentawai]

@@dirtniron Unfuknbelievable really, as fast as my RMZ450 but more nimble, smooth and because it's lighter it stops quickly. Running 14/52 sprockets. I will play with the power valve tomorrow and see what power personalities I create. Keep you posted 🤙

[@namibianbackyardengineerin4412]

Is this oil meant to be used in bikes because i heard if not it can make the clutch slip due to decreased friction. Im trying to find a cheaper option for my 2 stroke but don't want to damage something/loose performance. Love your videos

[@dirtniron]

this is very good oil, great for clutch and super inexpensive, tons of top guys are using this oil.. I use it on every bike i have/ride

[@RAD_Family]

Hey Rado, I should have asked you these questions when you had your 2 stroke 250sx, sorry. First question, did you ever change out the power valve spring? Which spring where you running red/yellow/green? Did you ever adjust the brass power valve adjuster (not sure if that is what it it is called) to make it flush with the outside ring? also did this model come with the power cable that was located under the gas tank that would change the way the bikes power was delivered, connected I believe the power was more aggrieve and unplugged the bike was more rideable?

[@dirtniron]

hey Joel, I did not do anything with my powervalve, I liked it the way it was. Not sure about the power cable, most likely there was no such thing

[@RAD_Family]

Dirt N Iron ok thank you, I have been researching up on your berg 450 and so far it might be an option for a next bike if I can find one down here in FL

[@dirtniron]

I just talk to a guy today who has 2 of them and have over 500 hours on the engine without a rebuild, oil change air filter.. he said he never had more reliable bike. it appears to be pretty cool machine ;)

[@thibo2107]

I have 10-w40 oil but it sas 4stroke and i wand to us it for 2stroke transmission ?

[@dirtniron]

i use 15w 40 for my 2 strokes

[@anthonycaldi7056]

Great Video! What year is that KTM?

[@dirtniron]

Thanks Anthony. 2004 250sx

[@apex3369]

Bought my first bike yesterday (KTM EXC 125 2007) and the guy who I bought it from said that I should put 700 ml of oil in there but some people say its better to put 600 ml ... Any advice ? Also told me to buy 10W-40 not 15W-40.

[@dirtniron]

check the manual for the bike and follow the recommendations, different engines had different oil capacity. you should also have a check screw for oil level, make sure you always have enough oil. 10w40 is fine too i guess.. i use 15w40 because thats what shell rotella has..

[@hotrodhootie]

I have a 2021 gasgas mc125 just changed the gear oil it had metal shavings where do the metal come from?

[@dirtniron]

gears probably..

[@captainchaos7706]

Have you had any problems with the oil your using not having wet clutch additives and shortening the life of your clutch?

[@dirtniron]

no problem at all, that oil is good for wet clutch. Its used by many guys in the industry

[@chrisporter8829]

How often you rebiuld your engine on your 2 stroke

[@tylermiketish6343]

I have a 13 sx250 I replace piston and rings every 2 years!

[@jaunmageau3749]

Thinking about buying a ktm 125sx (2003), would you recommend 15w40? thats what i ran in my kx450f

[@dirtniron]

yes, thats what we run in our 2strokes

[@jaunmageau3749]

@@dirtniron replying to this old of a video! Thanks man, earned a sub for sure!

[@dirtniron]

@@jaunmageau3749 thanks and welcome aboard!

[@lubino222111]

Hello , usefull video but i have one question , is it necessary to check the oil amount throught check bolt when u know the exactly amount of oil from manual ?

[@dirtniron]

+Enduro Wild you are right, you don't have to. I do it always, just to make sure.

[@lubino222111]

Dirt N Iron thanks for answer , you are from Slovakia btw?

[@dirtniron]

+Enduro Wild yes I am. You too?

[@lubino222111]

hej hej som .. :D ale na svk uz neziješ nie ?

[@dirtniron]

+Enduro Wild uz nie, v US zijem.

[@freetaylor72]

I got 2001 ktm and it calls for 20w 40, but I can't find it. So would the 15w 40 work

[@dirtniron]

yea 15w40 is fine

[@DanielPerez-mc5ct]

How much milliners of engine oil on a ktm 2001 250 MXC

[@dirtniron]

I am not sure, do some online search, you should be able to find the number

[@tisiv5871]

Hi, i have a 250sx 2016. My user manual says 0.8dcl of oil.. I've put 0.6dcl and oil allready started going throigh oil level check hole. Bike was on the flat surface. Should i put 0.8 dcl anyway?

[@dirtniron]

Dont overfill it, if the oil comes out then you are good to go. You probably didnt drain it all.

[@tisiv5871]

@@dirtniron thank you for your answer. i tried to move the bike side by side and there was nothing left. I leaned the bike to the point that my carb started leaking from the vent hoes.. But nothing came out from the oil drain hole.. So i think it was empty

[@vegasromaniac]

:D great job ... man ... I have about 50 hours on my oil in the ktm ... took it out the other day ... still clean like I put it in ... next oil change 100 hours :D let's see when it starts to get dark !

[@dirtniron]

+Vegas RoManiac dude, you ride a lot. You just got that KTM

[@jeremiahulmer6329]

Vegas RoManiac You are one of the biggest bafoons on KZbin that I've ever seen I'm sorry but damn

[@ninjaarcades7356]

Is it different oil that you mix with fuel for pre mixing

[@dirtniron]

yes it is

[@jakerobbins5724]

Can you give me a link to the vid you mentioned in your video?

[@dirtniron]

it was over year ago, if I recall correctly it was on Dirt Bike Channel. Sorry I dont have the link..

[@tonyrice1722]

Would you use the same oil in a ktm 125sx?

[@dirtniron]

Yes

[@dylanturley7291]

Can you use this oil with a recluse auto clutch?

[@dirtniron]

yes, I am pretty sure that is one of the oils they recommend

[@Kfx450rider11]

Dirt n iron can I use rotella on 09 ktm 65sx?

[@dirtniron]

i think so, I use rotella on all my 2 strokes

[@BRWfilms]

Realistically how many hours does a top end on a 2 stroke last? Before needing new piston or rings if took care of properly? I buy and sell bikes never really keep any but people are always hatting on 2 strokes saying they tare up a lot and all this I even see people online saying crazy thing like top end should be replaced every 20 hours which is just ludicrous

[@dirtniron]

+BRWfilms I think 100 hours of trail riding should be ok.

[@BRWfilms]

Dirt N Iron thanks! And also i have some smaller pit bikes as well, would you still recommend the same oil? 15-40 weight for those

[@Jeremy-dw2jt]

My dads kdx220 is 14 years old still has the stock top end from 2004. ¯\_(ツ)_/¯

[@mattipoysti]

Hey! Nice video again! I have one question: how long do you usually drive with same piston on KTM 250 SX?

[@dirtniron]

for trail riding I think 100 hours is ok

[@willik3186]

I have an 04 125sx and it has drain bolts on either side. Are these both for oil?

[@dirtniron]

i would think so, there are owners manuals online, I would check it there to make sure

[@willik3186]

Dirt N Iron thanks!

[@Muchteba]

Can I use this for a yz85

[@dirtniron]

yes

[@xd_gangster693]

So the transmission oil also lubricates the clutch?

[@dirtniron]

yes, only one kind of oil in this engine..

[@ferndoggy101]

Awesome video! I am new to dirt bikes and recently got a 1999 KX250 (2 stroke). Will this oil work for mine as well? Thank you in advance and keep up the awesome videos! Im hooked!

[@dirtniron]

+Fernando Valenzuela yes it will, I would use it.

[@angelpaniagua2624]

could i use 15w40 for my ktm 65sx

[@dirtniron]

yes I would

[@Nebula-rx7bj]

How do i check my oil level? I have a 2016 250sx

[@dirtniron]

best way is to change it, drain the old one and fill it up with fresh oil. There should be the number on the engine (850ml or similar) if not look it up online or in your manual. There is also a check screw on the engine that should be leaking oil once you take it out, but I never use it, make sure you put right amount of oil in and change it often - thats how I do it. Good luck!

[@mitchellbaxter5189]

one thing about the torque wrench for people who are about to buy one. These bolts only take about 15 ft/lb of torque. I would highly recommend buying the best wrench you can afford. The harbor freight wrenches are no good at low torques and will over torque those smaller bolts and ruin your day.

[@dirtniron]

+mitchell baxter very good tip, thanks for sharing bro!

[@hyposez1129]

Hello man i have a question. So basically for 2 stroke dirt bikes you need to change gearbox/transmission fluid and you also need to mix fuel with oil?

[@mohamadzeidan3048]

Yes they’re different oils though. Gear oil and fuel oil.

[@hyposez1129]

@@mohamadzeidan3048 Yeah i know that but i wanted to know if 2 strokes take oil like 4 strokes but for 2 stroke it is specific one for fuel and gear fluid also meant fot 2 strokes

[@dirtniron]

yes exactly

[@hazymcdudz5285]

What oil mix do you use?

[@dirtniron]

+Hazy McDudz if you are asking about ratio, I use around 40:1 to 50:1

[@devonkilgour1896]

What year is that KTM250? i just bought a 2003 KTM250SX

[@dirtniron]

mine is 2004

[@PTMG]

Lol my level check bolt was completely stripped out, it would slide in and out like a pin. Eventually I came home to find that it was gone so I just filled the hole with epoxy putty. Now I just measure the oil when I change it.

[@dirtniron]

thats one way to go. Some guys dont check the screw just follow the oil amount from manual.

[@tylermiketish6343]

Same thing happened with my 13 250sx I just tapped the hole and changed the oil to flush out any shavings tha th could've gotten in there!

[@ardikovaci6738]

Can I know how to change enigne oil 125 ktm 2 storke

[@dirtniron]

pretty much the same way

[@ardikovaci6738]

@@dirtniron can I ask what kind of oil I need cuz im new in dirty bike

[@chaos4469]

Is it worth it to trade a 2016 Honda crf125f for a 2006 Honda crf250r

[@dirtniron]

+Landon Huddleston I think it's it's probably better to sell. Did you compare prices?

[@chaos4469]

Dirt N Iron no

[@daltonwitt6079]

When should you change it?

[@dirtniron]

i do around 25h on my ktm.. check the manual.. see what they recommend

[@deimos3723]

Do you think 10 w 30 of this rotella oil work good in my kx 100 cause everything else is fuckin expensive

[@dirtniron]

try 15w40 rotella

[@vijaytvminicuts236]

Can we use diesel engine oil in two stroke

[@dirtniron]

Yes, for gearbox oil thats all i use

[@vijaytvminicuts236]

@@dirtniron sir I have a 2 stroke vintage bike Yamaha Rx 100 ...shall i use 4 t oil in gearbox

[@drewb4887]

I change my oil after like 8 hours on my 2 stroke. 20 hours is nuts and probably why your plug is covered in so much metal.

[@dirtniron]

Yes, i change it more often now too.

[@P00P_]

I use to freak out when I saw metal shavings but remembered my clutch doesn’t work that well

[@Mekmalatya]

500 ml my motorcycle ?

[@captainoleaginous7588]

First

[@akathecanadian]

Bet I forget to put the drain plug back in...

[@dirtniron]

you better remember that one ;)

[@mrvolts9262]

Dirt and irrrron!

[@dirtniron]

;)

[@scoremxcom]

If you wear your wedding ring all the time, how are you going to find your 'soul-mate' ??

[@dirtniron]

hahah, I found mine long time ago ;)

[@donavanjones9882]

10w ... 15w to thick

[@Sers0812]

No in the manual is written 15w50

[@Neophobical]

Cmon man u did not use ur gloves...

[@dirtniron]

i do, most of the time