How-to Measure Squish Clearance Part 1

Jeff Slavens explains... How-to Measure Squish Clearance Part 1

[@JoeJoeMoto]

Very simple method.

[@emilhansen3945]

Hei Jeff.. Thanks for your geat videos! Very helpfull.What "squish size" would you recommand for a EXC300 2011, running at sea level, and European 95okt fuel?Hope you have the time to reply :)

[@nathanshaw8162]

Hi how do I find out what the appropriate squish clearance spec is very every different bike?

[@enduro-parts-aus]

What size solder did you use? Or doesnt it matter

[@mikehayes2975]

Jeff. thanks for another helpful video. question: a lot of folks say to turn the flywheel back and forth past top dead a few times. however you only ran it past top dead once. is once all you do?

[@slaverace1]

Once is enough.

[@cosmokenney]

Part 2?

[@wojciech8881]

Thanks for this instruction but what is the minimum squish and how changing squish will effect for engine performance? What do you prefer for KTM 300 2017 used only in technical stuff?

[@anthonymacaluso1488]

Depends on the fuel you will be using, 0.60mm-0.70mm on high octane larger for pump fuel 0.80mm-0.95mm.

[@anthonymacaluso1488]

The squish space does exactly that -squishes air and fuel mix centrally for the best shot at complete and powerful combustion

[@anthonymacaluso1488]

I believe my numbers are safe and only what I use and have tested/ every builder has their own numbers

[@CW-up7xv]

Anybody know where to get this solder he speaks of for cheap and not 100 feet of it?

[@OldManEnduro]

Part 2 would sure come in handy right about now. Just rebuilt my top end and couldn't get a good measurement on the old base gasket as there wasn't much left of it. So, I just guessed with new one. Feels like I've lost some bottom end performance. 2012 250 XC-W.

[@slaverace1]

Measuring squish is for head mods NOT setting the deck height. You apparently installed a thicker base gasket which reduced low-end grunt.

[@OldManEnduro]

@@slaverace1 aha! I'm a bit of a new, so I was confused about this. Thanks a million for your quick response! FYI, I did order my top end kit from you to show my support for all of your great videos. You da man Jeff!!!

[@Kolsch221]

Sorry been a HONDA guy all my life until now, just put money down on the 2019 300xcw TPI. What’s the webpage for KTM candy lol. TY

[@slaverace1]

Congrats and welcome to the orange world. slavensracing.com

[@theyamahammer]

Do you guys sell a head for 2003 KTM 250 EXC?

[@kevinstearns4198]

ebay does

[@davetrueman2240]

Hey Jeff, Here's a product idea. Sell a little solder kit with a selection of sizes. Thanks for all the videos!

[@smokinjoe909]

hello.isnt the general squish clearance around .032 to .035 ? i always use .050 rosin core solder.thank you for the video

[@grahamlockwood7963]

ktm 380 can have .100" to .120" . no Idea why they did this though haha

[@FHCOutdoors]

So do you have a base gasket on right now while checking squish? Or is the cylinder metal to metal on the case?

[@slaverace1]

Yes, install the gasket first.

[@rafy600]

Jeff can I put and S3 head on a 2019 300 Tpi

[@slaverace1]

Yes, we sell S3 heads for all TPi models. slavensracing.com/shop/slavens-mule-high-compression-component-cylinder-head/

[@nickbryan4434]

when removing a mod head and putting factory head back on do i still need to check deck height

[@slaverace1]

No

[@rodrigostetson7188]

you all probably dont give a shit but does any of you know a trick to get back into an Instagram account? I was dumb forgot my account password. I would appreciate any tips you can give me

[@rowenkendall5971]

@Rodrigo Stetson instablaster :)

[@rodrigostetson7188]

@Rowen Kendall thanks for your reply. I found the site through google and Im in the hacking process atm. Takes a while so I will reply here later with my results.

[@rodrigostetson7188]

@Rowen Kendall It worked and I finally got access to my account again. I'm so happy:D Thanks so much you really help me out!

[@marlonhsu6407]

Is this applicable to 4 stroke scooter engine?

[@waynekerr8003]

Highly recommended

[@Kolsch221]

Where do you buy this head?

[@slaverace1]

Where else, the KTM candy store. Slavens Racing

[@grusiturbon]

Why do you do this? And what can I do if my bike has the wrong clearance ?

[@slaverace1]

+MrEmCom Stay tuned. I'll make another video to further explain.

[@grusiturbon]

Jeff Slavens any progress?

[@thisisobvious]

No part 2 yet?

[@slaverace1]

Sorry, building a new workshop/video studio. Stay tuned.

[@tajjson]

@@slaverace1 is the workshop ready soon? :-)

[@max0202]

What’s the measure of a 250 tpi 2018?

[@slaverace1]

From the factory they have .080".

[@max0202]

@@slaverace1 inch i imagine..

[@max0202]

@@slaverace1 damn it’s a lot… How far can I lower the squish while remaining safe? Original head

[@slaverace1]

@@max0202 You can safely reduce it down to .050".

[@max0202]

Thanks a lot!!

[@sxsmarine4075]

Can’t you just use clay

[@slaverace1]

Sure, but clay is difficult to get an accurate measurement.

[@jaysmith7137]

What is the point of this?

[@marioraja4229]

Jay Smith to pick the right base gasket (they come in diffrent thicknesses)

[@benashlin8845]

I think it is also called piston stop gap. There will be a speck for it and it will def effect you compression. you would change it by changing the gasket thicknesses between cylinder and bottom end. Maybe a pro can confirm this.

[@benashlin8845]

also called dimension x in manual

[@srpracingdevelopments3728]

You do not adjust squish by changing base gaskets because you would change the port timing outside what us required in setting Dimension X.

[@MrUmpleby]

@@benashlin8845 Used to do it on old Lister/Petter diesel engines, we called it bumping clearance then

[@aussi3212]

this is a ktm 300 engine for sure

[@mwillx]

Thanks man