EGT Info & Installation : Two-Stroke Scooters, Mopeds, Motorcycles, Sleds : Exhaust Gas Temperature

Everything you need to know about installing an EGT gauge on a two-stroke! Make sure you watch and learn about safe drilling practices to avoid engine damage. I'll explain sensor mounting properties, how to measure for piston skirt to sensor distance, show you my installation, and much more. Plus, I'll compare EGT, CHT and coolant temp monitoring.

🔸 Subscribe now and turn on notifications so you don't miss other helpful videos! 🔸

✅ PayPal "Tip Jar" ✅

Thanks for watching!

-----------------------------------------------
Parts, Tools & Supplies (Some are affiliate links.)

Koso EGT Gauge
Step Drills
Deburring Tool
Handlebar Mirror Mounts
Grips
Grip Glue
M5x0.8 0.090" Non-Fouling EGT Sensor

---------------------------------------------

Resources :

*************************
Songs & Sounds provided from the YouTube Audio Library. (In order of appearance.)
- Dumpster Door Slam
- Sun Spots by Silent Partner (Intro)
- Battle Crowd Celebrate Stutter
- Cumbia City by An Jone
- That One Bar Scene by RKVC

Bad Beep (Incorrect) sound effect by RICHERlandTV on Freesound, under Creative Commons Attribution License

0:00 Intro
0:34 CHT vs EGT vs Coolant Temp
03:11 Exhaust Gas Temperatures
04:34 Sensor Distance & Depth
07:22 Koso EGT Gauge Kit
09:23 Clamp-On Compression Fitting Sensor Mounting
12:19 Standard & Fast Response Sensors
15:03 Installing A K-Type Thermocouple Connector
19:15 Making A Weld-In Bung
21:03 Measuring Distance To The Piston Skirt
26:50 Drilling & Prepping The Header Safely
33:12 TIG Welding In The Sensor Bung
34:44 Sensor Installation
37:02 Gauge Mounting With A Custom Bracket
42:38 Gauge Wiring
43:51 Using The EGT Gauge

#EGT #Pyrometer #TwoStroke

[cagr]

I have been watching you channel for years now, and I do not just like the content but also your very articulative way of speaking -> very nice English-lessons for me ! (Germany)

[override]

i was looking for a service manual and i just find it at your website for free thank you very much keep it up the good work Bless you

[spegra]

just wanted to say thanks for this video
i have my highly tuned aprilia rs 125 (144 cc) 58 mm bore running at 1080 F with a custom ignition curve programmed in to the cdi and flying !!
the sensor takes all the guess work and countless plug chops out of the equation. (if its too hot at WOT up-jet)
thanks for the vid !
steve

[spasstamatov]

Hi man, will be very good and useful if make a video where we can see the changes of the exhaust gas temperature, when you make different carb settings. I mean the changes of the temperature according the quality of the fuel mixture... In my opinion, this gauge will be helpful when we make the carb settings....

[robertpierce]

Your patience is unrivaled sir.
Your data keeping skills are unequaled.
I am a total slob in comparison. Sorry.

[insoninenine]

Would be interesting to see you play with jetting to see how it responds to lean vs rich mixture, and whether you could actually increase performance or mileage respectively.

And show in action how this could be helpful in dialing in the carburetor from start, as well as using it as a gauge on when the jet should be changed due to seasonal differences in weather, etc.

Also, it would be nice to see an alert (red LED, beeping sound) when it hits danger-zone-.. if the Koso supports this.

[Zamani_Hidayah]

Thanks for this analysis..very useful.

[regish]

I welded my bungs with an oxypropane torch and silver-based solder, worked great and less chance of burning through the pipe.

[tot]

I enjoy the channel. Thanks for sharing: the tips are practical and insightful. No point trying to get absolute EGT temperature down to the last degree - it will depend on the engine, sensor itself, placement and other things. Comparing temperature with other setups to replicate the jetting based on temperature might not work. What will work is to plot the EGT against RPM to see if you can lean it out more or already over the hill: if temperature goes up as rpm increases - you are on the rich (safe) side. If the temperature starts dropping - you should check your jetting for that throttle position. Nothing is of course black and white with 2 strokes unfortunately. But if your sensor is calibrated - it will help to get an idea of what’s going on.
No need for EGT to be able to measure - at 1200C - your melted piston would tell you that well before the sensor could pick it up :-)

Next one to try is the lambda sensor. I have never used it on anything less than 125cc and it would be great to see if someone gave it a go.

[Shercorider]

Hi thanks for your info now i have a good reference. I run my speedlight 120cc. 2stroke on
107 CHT and 590 EGT degrees Celsius. On full throttle. Variation of a few degrees depending weather conditions.
I'm using the same devices as yourselves.
Nice video as always .grtz from belgium

[paulsmith]

Thanks for the tee shirt keep doing this stuff it's

[kartaroundtheworld]

you are a perfectionist (in a good way) !!

[override]

i just love your 2 stroke scooter enjoit it and stay safe

[jimciancio]

Pretty cool to see these finally being used to help tune 2 strokes! I've been going by EGT for years now and it's never let me down. There's certain times and places that you just can't really tell if your engine is leaning out or just a hair too fat. This method is failsafe way to learn what your engine is in need of and yes helps you prevent catastrophic engine failure from detonation if you can't hear it or it's running right on the edge of meltdown. One would think that any higher end equipment that utilized a 2 stroke now a days would come with a EGT kinda like a lot of Diesels do. Exhaust gases in any engine no matter how many cycles they have are no different than trying to read a air fuel ratio guage in theory they're doing the same thing, in a lean condition it's going to run hot as apposed to a rich condition running much cooler. But these also help you with your ignition timing as well for the same reasons. Great video and glad to see that this technique is being used for your scooters. I run anything from 2 stroke rc drag cars to big ones like in my golf cart, not stock BTW lol. But it's a great tool and it will save you time and money let alone a possible engine in the future when you have one and know what your looking at.

[BrainHurricanes]

15:15 I think that yellow heat resistant sleeve is supposed to be moved towards the connector, covering the wires completely. Now you've clamped the wires directly without any protection. Best regards.

[andreww.]

I’d love to watch your video or read your thread on how you installed that CHT on the cylinder head @1:20

[strokecarbtuningportingin]

Nothing personal just a simple observation. Growing up had many two strokes street bikes and lots of two stroke MX bikes there was no such meaning temperature sensors coolant sensors exhaust probes sensors or AFR learn how to jet your bike properly do what your motors asking not what your spark plug or what a temperature gauge is saying. Jet your bike for what it wants always start Rich work your way down I can honestly say I have never burned a hole in a piston yet. Short story long stopover complicating such a simple situation. This guy seems very knowledgeable well-read. Don't know how he got so lost with technology

[robertpierce]

Watching your videos makes me want to pressure wash my engine.

[richardshipman]

trail tech make some good stuff, no way would i have tried to tig weld on a used exhaust because you can't clean the inside, gas weld mig or braze would be much better thanks for taking time to do your videos good luck with your projects

[JoeStMars]

I have the KOSO sensor and display as well, but haven't mounted it yet. I will be installing it on a Minarelli Vertical exhaust system for a Pre-Bug. The location is going to be tight!! I'm wondering if angling the sensor would affect readings, instead of going in to a bung at 90 degrees, what if the bung was designed at an angle, then welded on and the sensor inserted in to the exhaust stream. please let me know your thoughts. This way of installing would be for tight clearance around the pipe and chassis.