How to set the Z dimension on KTM/Husaberg 250/300 cylinders

Http://www.slavensracing.com. Jeff Slavens demonstrates how to set the Z dimension on 250/300 KTM & Husabergs

[@skrueg1]

As always Jeff, thanks for posting this little tutorial. I feel a bit more confident on my next top end job. You take the mystery out of the maintenance when it comes to all things KTM. Thanks again.

[@nate67bus]

It's like you were reading my mind this week. Thanks for all the great videos.

[@jugghead981]

Thank You! I reference these videos every time I do my top end. It is a great way to familiarize myself before reassembly. To my fellow youtube viewers: If:you are watching the videos and they helped you do the job, please support the effort by buying your parts and accessories from Slavens Racing.

[@zsebi696]

Great video, thank you for explaining power valve Z dimension setting. Greatly appreciated.

[@michail1963]

was doing my top end yesterday for the first time - learned that best way is to use the caliper but look from the bottom of the cylinder to level the powervalve with the caliper...provides most accurate setting.

[@scoobidooit2308]

thanks for a making such kickass videos!! finally someone I can learn from and not fall asleep to, way too many vids on here with really good mechanics who unfortunately are as boring as bat shit when it comes to explaining what they are doing.. I can't take it any more!! you're my hero!!!!

[@slaverace1]

+Scoobi Dooit You're welcome.

[@flagovhate]

Scoobi Dooit "as boring as bat shit" that's a good one, I'll have to use that hahah

[@dough3208]

Thanks this is the info i needed

[@apr551]

cheers nice and clear instructions !!

[@mikelowry007]

Thanks Jeff!

[@slaverace1]

You're welcome.

[@TeamBallern]

HERO!

[@MainJet158]

How do you adjust a power valve on a 2020 250SX when a 300 kit is installed? The new power valve does not have a stop arm. Please show a video on how to adjust the 2020 valve without the stop arm. Thank you.

[@andynxtdoor]

i dont suppose you could make a video of how to tune up powervalve on a ktm250 sx 1996..ive tried and tried but it still bogs out..thanx

[@charlietindall8865]

Great video as usual! Thank you I have just installed a new top end on my 2019 xcw300 tpi and I’m wondering how important it is to get the Z dimension adjustment plate on the left side of the power valve exactly right? What will it affect if it’s off?

[@slaverace1]

Charlie: Sorry, but I'm not following your question.

[@charlietindall8865]

@@slaverace1 sorry about that. I’m talking about the plate with the two bolts that limits the range of motion for the power valve. How important is it to get that z dimension to get exactly right and is there an issue if I’m off?

[@jswervy16]

Hey Jeff, quick question. What would the symptoms of an incorrect Z dimension be? When I did mine on my 20TX 300, the flap did meet the max Z distance. It was short by about 2mm. As in the caliper was longer by a bit past the PV . Can you measure with piston at BDC with the cylinder still on if you have the Nihilo deck tool?

[@slaverace1]

Hello: If the PV flap is higher than the spec, that will cause a reduction in low-end torque. I have not tried using the Nihilo tool while the cylinder is installed but it will probably work.

[@jswervy16]

@@slaverace1 it seems to ride well. Good torque all around but the 1/4 throttle sputter is pretty annoying. I'm remapping now. Before I switched to an FMF exhaust and it helped smooth everything out.

[@tammo02]

​@@jswervy16did you get rid of sputtering

[@jswervy16]

@@tammo02 Yes but it required a remap and new head from TSP. Made a huge difference.

[@TheDirtbikeRider]

What can happen if this is not set correct ?

[@slaverace1]

+The Dirtbike Rider Poor performance.

[@pacop3759]

Is it possible that control flap touch piston or piston ring in MY2011?

[@slaverace1]

I have seen a slight interference before but that is not common or likely.

[@jhutch1470]

Are you located in Michigan? I have a 2018 Husqvarna TC 250 and I would like to send a jug to you for some port clean up.

[@slaverace1]

No, Colorado and sorry we don't do porting.

[@hablamedq]

can i work for you?

[@jordancave603]

anyone know the Z dimension for a 2017 bike?

[@slaverace1]

It's listed in your owner's manual.

[@thomaslockley81]

49.5mm

[@RobertKrus]

@@thomaslockley81 My manual shows it as 49.

[@max0202]

Is it valid for tpi?

[@slaverace1]

Yes

[@andynxtdoor]

where is the volume?

[@slaverace1]

+andrew waters Volume works fine on my computer.