Another great informational video! Thanks

Thank you it's very instructive ! Does the 13mm preload also works for a 250 exc 2010 ? I bought an used bike and I would like to reset the powervalves tuning.

Hi Jeff, I noticed yesterday in my KTM 2017 that 13 mm of outer spring preload causes 0 mm of inner spring preload, so this is the point when inner spring starts to work. In this setting both springs start the work when power valve wants to start opening. Isn't it the main reason why you suggest to set exactly 13 mm of preload?

Great mechanic ! Thank you for the teaching.

Do you use the 13mm of preload as baseline for all 3 springs? Same method for 17-18s?

Beautiful, thank-you good sir!

Ive lost some performance on my 17 300 XC-W I bought new. I purchased a Lectron Carb from you which is awesome other than the float bowl gasket gets wet damp after a ride you can see it a little dirty. But lately I feel I have lost some higher rpm. Is My powervalve out of adjustment perhaps?

just bought a 2016 sx should the springs have came with bike or di i have to buy aftermarket

Thanks for doing this Jeff. I set my 'Z' setting per the manual but when I look up in to my exhaust port my flapper valve is held open by a good 35%. So I readjested my PV rod to where the flapper valve is just bottomed out with slight downward pressure, because I assume this will greatly improve low end power. Is there any reason that I shouldn't be doing it this way? Thanks!

@36racing80

3 жыл бұрын

Any links to buy the spring kit for 2015 300 exc

Thanks again mate .... legend !!

Great vids very helpful

Thanks Jeff.

Around the 12:45-13:00 mark Jeff mentions he would rather you lower the engagement point of the PV because if you raise it too high there won’t be enough preload... I thought adding preload (turning in the brass adjuster) raised the PV starting point and lessening the preload(backing out the brass adjuster) lowered the PV starting point. Am I missing something?

How many turns in/preload is at stock setting?

Tc250 bogs won’t catch up with itself takes to long: also ride hare scrambles tight stuff any thoughts ? Have several bikes it felt like a lighter spark plug changed it a bit also ?

How many turns in from flush do you recommend with the yellow spring , to give me a rough starting point ktm300 2013 because ive been having trouble finding which spring works best cheers

Hey Jeff , I have ktm 300 exc and I was thinking the put red spring on my power valve but in video you say prefer yellow spring.I want to more hit red spring okay for me or not ? i dont get it.

@enduro-parts-aus

8 жыл бұрын

+Ali Osman Zornali red spring one and a half turns in from flush with the case is a good starting point for more power down low

Does the PV make a knocking or clanking noise when it's not under proper pre load? My 22 tc 250 with 6 hrs on it makes a noise with no real pattern to it coming from front of engine. The power doesn't seem very smooth either. Doesn't make the noise in neutral free revving. I can feel the PV opening and closing if I go down long straight road in 3rd gear, steady throttle slowly increasing throttle not over a quarter turn. Feels like it opens slow and maybe too low rpm. This is factory setting with yellow spring. Should add I've rejetted mikuni with JM and new block gasket. Already pulled pipe off and PV covers, everything is tight.

Hi Jeff, all the other reading and information I have come across says that the green spring is the softest and gives the best overall power curve without such a hit as opposed to the red. However they were saying it's because the green spring allows the valve to open sooner not later like your manual says? They said that red means it will build up more rpm before opening which means it hits harder, but this is the opposite of what your manual says. Any clarification on that?

@slaverace1

9 жыл бұрын

***** Red is the softest.

@ShawnBlais

2 жыл бұрын

Red is softest, so it allows the valve to open more easily, giving you the harder hit. The stiff green spring holds it closed, and gives you the "soft" power curve.

Wouldn't the 13mm spacing you measure depend on how much the gold adjuster is screwed in or out? Or is that spring not resting on the gold adjuster?

@NirHason

5 жыл бұрын

Yes, it depends on how much the gold adjuster is screwed in/out

so I assume if you do not have the initial 13mm you should back the adjuster in or out until your close? My power valve arm rattles inside the housing when it is engage/disengaging, I recently service the pv and nothing stood out as being suspect, it is a 06 so it has some hours on it, is this rattle something I should be concerned about? Thank you for your time and consideration Jeff, I appreciate all of the resources you offer.

@slaverace1

7 жыл бұрын

Ride it.

Love the rant on lengthy emails

What does the 13mm pre load mean. Are you saying to set it to 13mm to begin with, or is it going to be different for everyone as just your own personal baseline. Seems like you really just need the tach and watch the PV rod move.

does it matter what orientation you put the cover back on i didnt mark it when i took it off thanks

@slaverace1

6 жыл бұрын

No

i have a 2010 ktm 250 2 stroke it has lots of power on low rpm but not much on high rpm should i tune the powervalves or what could be wrong?

@sprockettv2927

4 жыл бұрын

Marko Klavzer get a red spring

How much turns are stock settings (exc250 2015) i found "2-1/2 turns out from all way in" is that correct ?

@slaverace1

9 жыл бұрын

The Dirtbike Rider As stated in the video, there is no stock setting.

how about my 2017 KTM 150 ex-w? dealer says I can't get a red spring!? is the colored springs the same tension no matter the engine size?

@slaverace1

7 жыл бұрын

The power valve adjuster on the 150 is only for setting the flap height and is NOT for tuning.

husaberg te 300 red spring 15 % plus power and at a cost off 1,21euro thanks a lot jef

What opening rpm do you recommend for the most linear setting using the green spring. Please. Thanks very much Jeff, great help!!

@slaverace1

10 жыл бұрын

That is explained in the video.

My dyno loves the red spring

hi there im having a problem with my 2000 ktm 250 EXC it loses all power when you hit ban, and is there suppost to be Transmission oil behind the powervalve abjuster?

@valko980

7 жыл бұрын

Did you solve your problem? I've got a 2002 EC250 and I can't even feel when it enters the powerband -_-

@duffman370

7 жыл бұрын

Hi There Yeah i fixed my problem is was water in the fuel and the fuel was crap for no reason new fuel, octain boster, new oil and filled it, check the spring behind the exhaust valve adjuster screw it may be broken or just worn

@valko980

7 жыл бұрын

Thanks. I too am suspecting the powervalve doesn't work properly, after all it's the only thing I haven't messed with but I lack the knowledge to do so :D

@edjarosz7568

7 жыл бұрын

The Duffma

Can you use that Fancy tool while the skid plate is in place?

@slaverace1

9 жыл бұрын

Jared Conville Depends on the skid plate brand.

Hey I went to take out my power Valle Spring as soon as I started loosening the cover not all of my crankcase oil started pouring out any ideas

@slaverace1

6 жыл бұрын

Please explain in English with punctuation.

@scotty6134

5 жыл бұрын

Jay Smith Lean it over to the left dude

Hi Jeff, Question. In the video you say you would set the valve to open at a lower RPM if anything, not have it open at a higher RPM. But then say "if there's not enough preload...". Maybe I'm confused here, but I thought you would have to add more preload to get it to open at a higher RPM. Am I missing something? Thanks

@slaverace1

7 жыл бұрын

More preload makes it open slower.

Is all of this info the same for the new TPI bikes? Is there a new video for the TPI bikes?

@slaverace1

3 жыл бұрын

Yes. I'll have an updated video out soon.

Is powervalve clacking ok or normal? I am new to 300's, and it is more noticeable after a rebuild.

@slaverace1

9 жыл бұрын

Michael Mahoney Powervalves do not make noise.

@ScaryJudgeofCaracter

8 жыл бұрын

+Michael Mahoney That's the clutch basket, sounds like its coming from the power valve but its not. You will get countless hours from your clutch basket or buy an aftermarket hinson one - the clacking goes away.

Thanks for taking the time to share this info, I'm a little confused though, I have just bought a new TE300 and was advised by the dealer not to mess with the square adjuster, it also states in the manual "Screw must not be turned as this would worsen the engine characteristic", yet it seems most people adjust them. Are KTM just covering their arses by stating this?

@stefanc2242

8 жыл бұрын

+Bad Meaning Good Adjusting them is fine. Just be careful because it's difficult to return to the factory setting. Also too much adjustment could cause problems too.

@bigmick6

7 жыл бұрын

Dead Mike

@arrow09

4 жыл бұрын

I know this is 3 years ago and it's probably irrelevant now, but ktm recommends not changing the spring or preload on the tpi

@simonbarber3936

6 ай бұрын

@@arrow09on the tpi it is just to cover there asses on emissions, on these older bikes why would they add all this adjustment and then tell you not to adjust it, for the new bikes I would fiddle with it but not do crazy adjustments.

Wb a 200 xcw?

Hi ! Where I can buy those springs ?

@slaverace1

8 жыл бұрын

Where else? www.slavensracing.com

I don't fully understand what the 13 mm preload information is doing for me. If you make an "adjustment" later do you loosen and measure again to see how much it went up or down. How do you use the tach to help set power valve? I am aware making adjustments will increase or decrease initial opening of the valve. So why is the 13 mm important?

@GertBowker

7 жыл бұрын

Yeah me two, no idea So why is the 13 mm important? I guess the 13 mm is the amount of clearance for you to adjust should you turn it all the way in I guess. Jeff ?

@codyjoseph44

7 жыл бұрын

I'm guessing he has done the testing, and found out that 13mm of preload (with the yellow spring) is a great starting point to get him in the ball park of the PV starting to open at the recommended 5,600 rpm's. That way it will just take minimal adjustments to fine tune it, and the marks on the case and adjuster gives a reference point if you want to start over at 13mm preload. That's how I took it anyways. I'm sure there would be a better starting point for the red and green spring. No matter what spring you are running, you want them all to START opening around the same time. This is where the tach comes in if you want to be very precise. You can pull the PV cover, rev the engine and see at what RPM the linkage arm starts to move. Then you just adjust accordingly so that its starts to open around 5,400 - 5,600 RPM. The difference between the springs is just how long it take for them to FULLY open, not when they should start to open. So obviously the light red spring will fully open much faster than the stiff green spring. The quicker the PV opens (red spring), the bigger and more noticeable burst of power you will feel (harder hit). The slower and more gradual the PV opens (green spring), the smoother and more manageable the power will feel. The yellow spring (most preferred) falls in between the other two. When choosing which will work best you must consider your other modifications, riding style, terrain, size of bike, and of course your personal preference.

@keithcastleberry3993

7 жыл бұрын

It finally all clicked for me. I get what he is doing and now....a month + later I read your replay again and re watched the video it makes sense to me. Thank for taking the time Cody to reply in detail. I am eager to get the dust of this thing again and start tweaking it so this thing will RIP. That is rip...not "Rest In Peace"!!! Take care and happy trails man!

@keithcastleberry3993

7 жыл бұрын

Gert... the 13mm is just the "magic" number (distance) he achieved using that specific spring and "lightly" putting bolts in to hold cap up without compressing the spring any. Just very light tension on spring. Now, once pressed in and snug against case...there is 13 mm of "preload" . The mark he made consider that zero. Turning PV adjustment screw clockwise will increase preload on spring and ccw will lessen preload. If I understand correctly, with the engine running and the PV cover off, turning the PV adjuster screw will change when the PV starts to open. The goal is to adjust it, rev it and watch linkage and RPM (get a friend to help) Try to dial it in to when the PV starts opening when RPM's reach the 5400-5600 range. As Cody mentioned to me above, ALL springs start opening at that RPM range. The lighter springs allow PV to open fully in a narrower RPM band. The heavier springs will make the power feel more linear and manageable by opening up fully later over a longer RPM band. I hope I made sense. I believe I got it now and wanted to try and help. Hopefully I did. Good luck.

@yee8145

6 жыл бұрын

yep you got it and helped :)

My '17 TX300 came with an hour meter, is it also a tach?

@slaverace1

6 жыл бұрын

yes

@lbeck119

5 жыл бұрын

@@slaverace1 are these the kind of dumbass questions you are asked a lot???🤣🤣🤣🤣

Jeff, it would be cool to see a bike on the dyno with all three springs installed.

@slaverace1

2 жыл бұрын

Shawn: The springs change power delivery but they all deliver the same overall HP.

@shawnbrummett587

2 жыл бұрын

Thanks Jeff! I understand, ide just like to see the dyno chart with all 3 springs turned flush

@slaverace1

2 жыл бұрын

@@shawnbrummett587 Sorry, dyno time is very time consuming and I prefer to be on the trail before I get too old to ride.

@shawnbrummett587

2 жыл бұрын

I hear ya man! Thanks for the videos

How do you keep your bike so clean?

@slaverace1

7 жыл бұрын

Elbow grease. I'll make a bike cleaning video soon.

@Borrower1

7 жыл бұрын

Can you please post a link to where I can purchase some of this "Elbow grease"?

@032254855

6 жыл бұрын

if it doesn't come off with a water blaster it doesn't need to come off

@Anthony-sr8cs

6 жыл бұрын

Don't get it dirty

will these work on a 2016 150?

@slaverace1

7 жыл бұрын

No.

@austinwoodruff2096

7 жыл бұрын

Jeff Slavens k thanks

Can anyone tell me what kind of tach to use and how to hook it up ?

@slaverace1

6 жыл бұрын

Here is an easy solution >>>> slavensracing.com/shop/tach-hour-meter-trail-tech/

@01cissy

6 жыл бұрын

Thanks. I should have watched the whole video before commenting. Will place the order with you today.

Hi Jeff, I have a burning question... I have a 2018 ktm 300exc tpi, I have been told by my dealer that the tpi models do not come with any spare springs like my previous models did, the dealer says because it is factory preset & the ecu sorts the power band out this is the reason that on the tpi models the springs should not be adjusted from what is already in there, is this horse shit or true ?? many thanks.

@slaverace1

6 жыл бұрын

We don't have 300 TPI models in the USA.

@taffyboy07

6 жыл бұрын

Jeff Slavens, Isn't all the new 2018 2 stroke models (250 & 300) now fuel injected ? & for some reason Ktm called it tpi

@slaverace1

6 жыл бұрын

In the USA, only the 250XCW is offered with fuel injection for 2018. 300TPI is offered in other countries. TPI is an acronym for Transfer Port Injection.

@danielgriffiths5945

5 жыл бұрын

taffyboy07 I own a 2019 KTM xc-w 300 TPI, made in the USA. It’s not recommended to change the spring.

Is this mode good for husqvarna te 250 2017 to???

@slaverace1

2 жыл бұрын

yes

@ady23nos

2 жыл бұрын

@@slaverace1 thank you! I follow everything you post! Greetings from Romania!

Has anyone on here ever run without the colored spring? I heard you can simply remove the auxiliary spring altogether.

@amryamaha

4 жыл бұрын

yeah do it. it works awesome!!! I did

Do honda crm 250 have these?

i have a 1992 ktm 250 2 stroke that has low rpm power but no high rpm at all can anyone help

@slaverace1

8 жыл бұрын

+Mike Webb In 92 they had a problem with the powervalve flap breaking. Pull the cylinder and inspect.

@mikewebb9970

8 жыл бұрын

thanks so much it was broken

@bcdefg19

7 жыл бұрын

Jeff Slavens

Just did this today....no change in power output. Found my adjustment screw is in much father now just to achieve the 13 mm preload spacing. Rod starting movement in the 5500-5600 range (yellow spring). Rod ball snapped in just under a bit of load or down pressure as suggested.... needed turned down 2 full turns to acquire this. I am lost. Max RPM only gets to maybe 6800. This is an 08 300 XC-w. Never has ran ell since bought. Rebuilt motor while back only 59 hrs now. Still never has ran right. No top end power. 35 pilot jet, 172 main and the new Suzuki needle on mid position. I can look number up later. Help anybody.

@slaverace1

6 жыл бұрын

The PV adjustment does NOT improve power output, just changes the power delivery. The problem you describe is likely not a PV issue. Does your muffler have a spark arrestor? If so, what brand?

@keithcastleberry3993

6 жыл бұрын

Jeff Slavens exhaust is a gnarly gold FMF with a turbine core II

@keithcastleberry3993

6 жыл бұрын

Could this be as easy as cleaning/repacking muffler??

@slaverace1

6 жыл бұрын

No. Thought you might have a screen type SA.

Never could understand why anyone would to choose to detune there bike.

Another good thing gone from orange bikes 😢