You caught your mistake and that’s the most important thing. Even more stand up that you addressed your mistake and put it out there for everyone. Great video man 👍
Great job, always do a bit of research, I do just to see if anyone has discovered a new method of anything. And when assembling you have to always think about what your assembling and how it works. You should have never missed how that arm mounts. Probably due to trying to record while servicing. Thanks for the video.
Live and learn mate - recently got a YZ250X (2020 model) and it isn't quite running right. I been dicking with the jetting but now think it might have something to do with the powervalve, so thanks for this vid. Cheers!
Yo did you ever figure this out? What was your yz250x doing? Mine is basically hitting a wall no more power in 5th gear I’d be surprised if it ran 50 mph - thanks
For all watching this great video, this assembly piece is key in order to properly tourque the PV governer linkage to the end of the PV shaft assembly. Just tightening it down can bend or break the PV 1 return springs. All this is addessed in the manual. Great video !
I have a 1999 yz250 with a rebuilt top end broken in correctly and it only hits the powerband only 1st gear but dosent in all other gears i dont know whats wrong
The 10mm bolt with the spacer behind, the notch is where you put a pointed pic to stop the lever to stop movement when you loosen or tighten the 10mm, also spraying brake clean does NOT clean the powervalve properly, fully disassembled is required and strong cleaner like YAMAHA CUMBUSTION CHAMBER CLEANER should be used to clean it along with a brass wire brush. I've been riding YAMAHA since the early 80s, same idea goes for Kawasaki KIPPS, Honda ATTAC
Any advice to get the power valve arm to key into the actuator? I put the actuator into the case half and try to align the arm to the actuator grove but it does not seem to line up correctly. The arm won’t stay n the grove as I’m bolting it together
Same problem with my 1999. Good thing you fixed it because if it keeps getting left open that will leave a lot more problems. Valve is all about back pressure and it will cause your two stroke to foul plugs like a fucker.
@moto century what 1999 bike do you have and im having problems with my yz250 not hitting the powerband and its a rebuilt top end only hits powerband in 1st gear
Emmanuel Parra I would clean out your power valve, I would take out your power valve (arms, springs, 2 cylinders, all those little pieces) clean thoroughly and re assembly with prelube and lock tight for those little 3 screws. I would make sure that the 2 opening cylinders on each side of the cylinder aren’t opening at the same time or in sync, that could also cause that. I’d also check your carb settings and tune from there.
good job dude, everyone on here is talking shit about literally the stupidest things. It's your bike, you cleaned it first, you'd know if any major debris fell into the engine. don't let them get to you, they've probably never worked on an engine in their lives.
You don't need any major debris to fall in for it to be a bad thing. All that gunk contains tiny particles which could destroy any moving parts or scratch the cylinder. You really don't want to spray that dirt down into your engine. The right way to do it is with the cylinder off the bike. With that you can leave the radiators on the bike.
Great video mate. Two questions, did you fit a new gasket on the exhaust valve cover? And also your number plate, how does it fit that well although your bike is older? I am pretty sure the number plate is for a 2015+.
Mike Hancho I know mate, but the number plate does fit without an adaptor unless it is a 2006 model onwards. When you use the adaptor though the number plate seats further and that does not look that good.
Dude When you tightened the arm back onto the valve linkage your suppose to put a pin in first that’s supplied by Yamaha when you buy the bike before you tighten it. Otherwise you could damage it. Be careful when assembling. And my opinion and only my opinion, I would just remove the head and cylinder at this point to pull the entire valve apart and remove to clean But that’s me.
Wright & Rong I only learned that by watching you tube videos on cleaning that valve because mine was all gummed up. But I didn’t realize it until after the fact. Luckily I didn’t damage anything. And I get it for not taking cylinder off. Great quick fix to get back out and BRRAAAPPPPP. 🤟🏻✌🏻
@@georgenixon3086 orite bud I have 2008 yz 250 and my bike power valve doesnt seem to kick in it just feels like the bike builds up a bit speed but no oomf when power valve should be kicking in, I took top end of an completely disassembled power valve and cleaned everything as I had condensated oil coming from power valve breather hose it was grey I think water got in top end so I took the whole topend off cleaned all power valve every piece and reassembled it all but still doesnt seem to be brappin also the bike sounds muffled aswell not crispy and I've blow torched all carbon out header and I've gt new packing to put in but any ideas on what's goin on mate my 01 ya 125 is faster than my 250 which isn't right lol, any info would be much appreciated bud, cheers. Gary 😉
@@georgenixon3086 if you could even watch 20 seconds of my most recent yt vid you,ll hear what I mean about the lack of power and the muffled sound compared to my friends bike who's with me his is crispy as anything its Gstar MX my channel and I dont want you thinking I want views lol even jst watch it for a few seconds I'm wearing the gopro u will see what I mean, thanks mate. Gary 😉
@Jackson smith same here bud it sounds muffled on my YZ250 2008 and my 125 is faster than my 250 did u happen to get it fixed yet mate I cleaned all my power valve but it's still got nowhere near the power it should it's like the powerband doesnt kick in it jst goes the same speed if u know what I mean 👍, let me know if u get it fixed and I'll msg u if I get mines sorted first to let u know what the issue was, have u gt a youtube channel I,ll look at your vids and see if ur bike is running like mine 👍, if you could watch even 30 seconds of my most recent vid and let me know if that's what's happening with your bike it would be appreciated, I'm not tryin to get more views on my vids so dont worry lol even jst check it out for few seconds and ul see what I mean its Gstar MX bud an hopefully we can gt them sorted, cheers mate. Gary
Hey there have you ever had coolant leak out of power valve breather with a gunky power valve? I have a brand new yz 250 and only rode 10 times and twice when shutting down I noticed coolant coming from valve breather.
The coolant overflow is right next to the ypvs guck drain. Guck drain is black hose, clear one is the coolant overflow, slow speed riding or idling a hot engine will cause overflow, if your riding trails and it's getting hot, make sure as soon as you stop turn it off. I ride hard enduro on my 2018 yz250 and to help with overflow I added a coolant overflow recovery tank, video on my channel. Have a look
URGENT!!! I cleaned all the gunk out of my powervalve on my 2004 yz250 and its been running like crap i did everything you did has a bit more kick now but when i start it it idles and revs really high i have to let it idle of a bit for it to idle normally and it never did that before infact i dont think any 2 stroke is supposed to do that
Also second time i kicked it after cleaning the power valve i heard a pop sounded like backfire then started it again and it was fine until the bike cools down the whole process starts again i start it it revs out like fuck then kill it start it again and it idles fine ive messed with the idle screw and nothing only idles somewhat normal when it warms up idle screws fine too but doesnt matter what i turn it to it makes mo difference
@@brandonstallard22 take out the bolts holding in the power valve itself and remove them from the cylinder and clean them and the inside of where they sit thats why its worse because all he did was clean the back of them and that dose nothing then dip ur finger in some premix and rub a tiny bit of it on the powder valve and shaft and use blue locktite on the bolts holding it in
Not sure! Seems like it might just gum that area up like mine was. I was suspicious because my bike had very little torque at low rpms but the power felt fine when revved out.
Not the best way to clean the power valves . All the crab spray went down into the cylinder. . You can easily pull out the values by using a allen key . Place a small key under pin or in the pin hole. Wiggle and pull up. Check your owner manual for diagram directional insert of the power valves. Some bikes the head will have to be removed to free valves.
Sorry, but you need to take the cylinder off and remove ALL the power valve parts to be cleaned and inspected …if you want your engine to work correctly for a long time.
So just so tht your aware all of tht of witch u just sprayed has now maid it into the crank case hope yer piston isn’t at top dead if it is all tht shit just went str8 down... next time don’t go into it blind...
That’s what I was thinking watching this as im about to do it on my kx, should I just put some 2t oil in there for some lube? And what should I clean it with to begin with
WOW , Why didn't you spray the dirt off the bike first ? I would have removed all the power valve parts and cleaned them , not spray the cleaner in the engine , wow !
@@WrightRong ... Apartment ? What about so many bikes in the video , they have a storage like that ? Oh right, apartment don't have water I forgot about that.
@@squishytacticalnuke6991 ..... Your two cents from the peanut gallery , ggg Dirt is a big problem while working on an engine and the biggest enemy for a mechanic ( I'm a mechanic) but you didn't know that cause you don't know shit ! He said he lived in an apartment , I have never seen an apartment with a storage basement , have you big mouth? Always wash your engine before working on it KID Taylor , GGG.
Oh man, Don't ever open any engine component without at minimum power washing the bike. damn. Second, when you tighten the power valve arm, there is a little hole under it for you to put a drill bit or something similar so that when you tighten the arm gets stock there and gives you leverage to tight it hard, and you should also torque that stuff. So much wrong, man at minimum never do any work without watching a youtube video.
You caught your mistake and that’s the most important thing. Even more stand up that you addressed your mistake and put it out there for everyone. Great video man 👍
Thank you for this video. I was having the same issues on my 125 and needed a walkthrough of this
Really appreciate this video. I’m having the same problem on my 125 and was completely lost!
I hope it can help out! This was the last idea I had, and holy crap did it make a difference!!
Nice job 👊🏼 good feeling when you do it yourself.
Good video. Glad you showed the mistakes connecting the linkage. I guess I was lucky to have never needed to clean the power valve
Love the music in the background :)
Great job, always do a bit of research, I do just to see if anyone has discovered a new method of anything. And when assembling you have to always think about what your assembling and how it works. You should have never missed how that arm mounts. Probably due to trying to record while servicing. Thanks for the video.
You helped me fix my rm 85 that would sputter right before hitting power band. Power valves were sticky n gunked up
Awesome! Glad to hear ya got it fixed!
That’s exactly what my yz250 is doing
Thanks for the video. Very helpful!
Its good to inspect and clean every other time the top ends done,did you rejet for that pipe?
Everytime I take the cylinder off for a rebuild I run it through an ultrasonic cleaner, does wonders for the exhaust port and power valves.
What cleaner do you use?
Live and learn mate - recently got a YZ250X (2020 model) and it isn't quite running right. I been dicking with the jetting but now think it might have something to do with the powervalve, so thanks for this vid. Cheers!
Yo did you ever figure this out? What was your yz250x doing? Mine is basically hitting a wall no more power in 5th gear I’d be surprised if it ran 50 mph - thanks
@@KNRiding nah I got tired of it and sold it. Have had a 2012 ktm 200 for ages now, a better bike in every way. Cheers!
There is a Ø4mm pin to use when re-assembling the PV drive link, it sets the static timing/governor preload.
It goes in the slot on the link quadrant and a hole in the cylinder.
For all watching this great video, this assembly piece is key in order to properly tourque the PV governer linkage to the end of the PV shaft assembly. Just tightening it down can bend or break the PV 1 return springs. All this is addessed in the manual. Great video !
i have a question what is that panel you took off called when you said that the stuff in their was clean
I need one of those chairs!
I have a 1999 yz250 with a rebuilt top end broken in correctly and it only hits the powerband only 1st gear but dosent in all other gears i dont know whats wrong
The 10mm bolt with the spacer behind, the notch is where you put a pointed pic to stop the lever to stop movement when you loosen or tighten the 10mm, also spraying brake clean does NOT clean the powervalve properly, fully disassembled is required and strong cleaner like YAMAHA CUMBUSTION CHAMBER CLEANER should be used to clean it along with a brass wire brush. I've been riding YAMAHA since the early 80s, same idea goes for Kawasaki KIPPS, Honda ATTAC
Any advice to get the power valve arm to key into the actuator? I put the actuator into the case half and try to align the arm to the actuator grove but it does not seem to line up correctly. The arm won’t stay n the grove as I’m bolting it together
How clean should the pv be? The wire brush isn’t going to scratch it? Should I also wire brush the ports they go into?
Same problem with my 1999. Good thing you fixed it because if it keeps getting left open that will leave a lot more problems. Valve is all about back pressure and it will cause your two stroke to foul plugs like a fucker.
@moto century what 1999 bike do you have and im having problems with my yz250 not hitting the powerband and its a rebuilt top end only hits powerband in 1st gear
Emmanuel Parra I would clean out your power valve, I would take out your power valve (arms, springs, 2 cylinders, all those little pieces) clean thoroughly and re assembly with prelube and lock tight for those little 3 screws. I would make sure that the 2 opening cylinders on each side of the cylinder aren’t opening at the same time or in sync, that could also cause that. I’d also check your carb settings and tune from there.
good job dude, everyone on here is talking shit about literally the stupidest things. It's your bike, you cleaned it first, you'd know if any major debris fell into the engine. don't let them get to you, they've probably never worked on an engine in their lives.
Haha, appreciate it man!
You don't need any major debris to fall in for it to be a bad thing. All that gunk contains tiny particles which could destroy any moving parts or scratch the cylinder. You really don't want to spray that dirt down into your engine. The right way to do it is with the cylinder off the bike. With that you can leave the radiators on the bike.
What year model man?
I ahve. 125 and it bogs at lower gears and does not hit the power band what could that be? Can anyone help me?
Power valve.... didn’t know I had one. Good to know
Great video mate. Two questions, did you fit a new gasket on the exhaust valve cover? And also your number plate, how does it fit that well although your bike is older? I am pretty sure the number plate is for a 2015+.
He has a whole restyle kit all the plastics are like the new bikes
Mike Hancho I know mate, but the number plate does fit without an adaptor unless it is a 2006 model onwards. When you use the adaptor though the number plate seats further and that does not look that good.
@@nikossokin4428 every number plate for yz250s fit the same 2002 and onward until 2019 I believe , I don’t know what adapters you’re talking about
@@abelvelazco5450 the 125 requires adaptor for the number plate
Thanks good video
What oil were you running?
Dude
When you tightened the arm back onto the valve linkage your suppose to put a pin in first that’s supplied by Yamaha when you buy the bike before you tighten it. Otherwise you could damage it.
Be careful when assembling.
And my opinion and only my opinion, I would just remove the head and cylinder at this point to pull the entire valve apart and remove to clean
But that’s me.
Yea! I noticed that! And you're very right!
Wright & Rong I only learned that by watching you tube videos on cleaning that valve because mine was all gummed up. But I didn’t realize it until after the fact. Luckily I didn’t damage anything. And I get it for not taking cylinder off. Great quick fix to get back out and BRRAAAPPPPP. 🤟🏻✌🏻
@@georgenixon3086 orite bud I have 2008 yz 250 and my bike power valve doesnt seem to kick in it just feels like the bike builds up a bit speed but no oomf when power valve should be kicking in, I took top end of an completely disassembled power valve and cleaned everything as I had condensated oil coming from power valve breather hose it was grey I think water got in top end so I took the whole topend off cleaned all power valve every piece and reassembled it all but still doesnt seem to be brappin also the bike sounds muffled aswell not crispy and I've blow torched all carbon out header and I've gt new packing to put in but any ideas on what's goin on mate my 01 ya 125 is faster than my 250 which isn't right lol, any info would be much appreciated bud, cheers. Gary 😉
@@georgenixon3086 if you could even watch 20 seconds of my most recent yt vid you,ll hear what I mean about the lack of power and the muffled sound compared to my friends bike who's with me his is crispy as anything its Gstar MX my channel and I dont want you thinking I want views lol even jst watch it for a few seconds I'm wearing the gopro u will see what I mean, thanks mate. Gary 😉
Long live AVENGED SEVENFOLD
Nice work.
I have that same problem but it’s with my top end power?
@Jackson smith same here bud it sounds muffled on my YZ250 2008 and my 125 is faster than my 250 did u happen to get it fixed yet mate I cleaned all my power valve but it's still got nowhere near the power it should it's like the powerband doesnt kick in it jst goes the same speed if u know what I mean 👍, let me know if u get it fixed and I'll msg u if I get mines sorted first to let u know what the issue was, have u gt a youtube channel I,ll look at your vids and see if ur bike is running like mine 👍, if you could watch even 30 seconds of my most recent vid and let me know if that's what's happening with your bike it would be appreciated, I'm not tryin to get more views on my vids so dont worry lol even jst check it out for few seconds and ul see what I mean its Gstar MX bud an hopefully we can gt them sorted, cheers mate. Gary
Hey there have you ever had coolant leak out of power valve breather with a gunky power valve? I have a brand new yz 250 and only rode 10 times and twice when shutting down I noticed coolant coming from valve breather.
I haven't. I don't believe coolant is supposed to be in there, sounds like the head gasket may be letting some into the cylinder?
@@WrightRong ok thank you
The coolant overflow is right next to the ypvs guck drain. Guck drain is black hose, clear one is the coolant overflow, slow speed riding or idling a hot engine will cause overflow, if your riding trails and it's getting hot, make sure as soon as you stop turn it off. I ride hard enduro on my 2018 yz250 and to help with overflow I added a coolant overflow recovery tank, video on my channel. Have a look
URGENT!!! I cleaned all the gunk out of my powervalve on my 2004 yz250 and its been running like crap i did everything you did has a bit more kick now but when i start it it idles and revs really high i have to let it idle of a bit for it to idle normally and it never did that before infact i dont think any 2 stroke is supposed to do that
Also second time i kicked it after cleaning the power valve i heard a pop sounded like backfire then started it again and it was fine until the bike cools down the whole process starts again i start it it revs out like fuck then kill it start it again and it idles fine ive messed with the idle screw and nothing only idles somewhat normal when it warms up idle screws fine too but doesnt matter what i turn it to it makes mo difference
@@bradleyvandyk725 get it fixed? Mines doing the same
@@brandonstallard22 take out the bolts holding in the power valve itself and remove them from the cylinder and clean them and the inside of where they sit thats why its worse because all he did was clean the back of them and that dose nothing then dip ur finger in some premix and rub a tiny bit of it on the powder valve and shaft and use blue locktite on the bolts holding it in
I love u.
What will happen if u ride the bike like that are u cant and how did u know that the power value was open
Not sure! Seems like it might just gum that area up like mine was. I was suspicious because my bike had very little torque at low rpms but the power felt fine when revved out.
My bike is leaking a lot of oil out of the cover on the side of the engine right from where the top of the arm connects does anyone know the problem ?
Yes, there is an o-ring behind that bolt. Pull the entire power-valve and replace the power valve shaft o-ring
Not the best way to clean the power valves . All the crab spray went down into the cylinder. . You can easily pull out the values by using a allen key . Place a small key under pin or in the pin hole. Wiggle and pull up. Check your owner manual for diagram directional insert of the power valves. Some bikes the head will have to be removed to free valves.
Thank you that helps
(in the background) this means war
Stop telling the guy he did this wrong and he did that wrong and all this other crap, let him do what he wants to do it's his damn bike.
Always wash your bike before ya wrench on it man
I wouldn't have sprayed WD40 in there. Just spray some pre mix in there. This video needed to show the bike running ...
Sorry, but you need to take the cylinder off and remove ALL the power valve parts to be cleaned and inspected …if you want your engine to work correctly for a long time.
“ you just got punk’d!” Lol! Jk
Whitesnake did a hell of a lot better job though on here I go again
Yes sir they did! Couldn't use that without risk of copyright though!
So just so tht your aware all of tht of witch u just sprayed has now maid it into the crank case hope yer piston isn’t at top dead if it is all tht shit just went str8 down... next time don’t go into it blind...
It'll be fine, being 2 stroke it should've all cycled out pretty quick. You're not wrong though!
That’s what I was thinking watching this as im about to do it on my kx, should I just put some 2t oil in there for some lube? And what should I clean it with to begin with
Annnnnd this is why not everyone should be a mechanic smh so many things done wrong here.
Smh smh
@@WrightRong ya but it’ll burn it out like you said 🤣 💀
@@THE_JB222 ☠️☠️☠️
Ahh hell, gotta learn how to do shit. Hell with haters
WOW , Why didn't you spray the dirt off the bike first ? I would have removed all the power valve parts and cleaned them , not spray the cleaner in the engine , wow !
Lack of foresight and living in an apartment haha
@@WrightRong ... Apartment ? What about so many bikes in the video , they have a storage like that ? Oh right, apartment don't have water I forgot about that.
@@goodboyringo9716 take it easy on the guy he is being a good sport , even about you being a jerk about it. at least he has a bike that runs.
@@squishytacticalnuke6991 ..... Your two cents from the peanut gallery , ggg
Dirt is a big problem while working on an engine and the biggest enemy for a mechanic ( I'm a mechanic) but you didn't know that cause you don't know shit !
He said he lived in an apartment , I have never seen an apartment with a storage basement , have you big mouth?
Always wash your engine before working on it KID Taylor , GGG.
@@squishytacticalnuke6991 .... So the hell what if I pissed you off ! I can't help if if you are a wimpy . Go cry on your mommy's dress tail.
Clean the bike before you work on it. Also your air filter was dirty.
😅😅ur not a stu...p it's just ur frist 😂I'm the same I'm getting there
Oh man, Don't ever open any engine component without at minimum power washing the bike. damn. Second, when you tighten the power valve arm, there is a little hole under it for you to put a drill bit or something similar so that when you tighten the arm gets stock there and gives you leverage to tight it hard, and you should also torque that stuff. So much wrong, man at minimum never do any work without watching a youtube video.
Paulo Campos Thank you for letting me know👍🏻