[Marts1414]

Just recently build a grom with the dhm kit.
installed the supplied oil cooler. A high flow koso oil pump and a few other supporting mods. I purchased a nordix cylinder head tempature sensor on Amazon. It reads the temperature from the spark plug. At wot or running the bike hard the temps quickly climb over 120 Celsius. It won’t read any higher. Is 120 or hotter in the danger zone? I feel I may be in a safe operating temperature but my guage I bought doesn’t read hot enough temps. Any feedback would be appreciated

 

[Ristur]

120 Celsius on WOT is very low for CHT. My DHM HC does 110 Celsius running idle and goes up to 190 on WOT in the long runs. I don't want it to go any higher, did that before and that didn't end well

 

[deoodles]

I have a cyl temp on a yx140 in a pit bike 340deg F is normal for it

 

[Marts1414]

Thanks guys. I have since ditched the spark plug temp sensor and went with an oil temp sensor that read the oil from the drain plug. Koso makes the sensor.

 

[deoodles]

I run a similar setup on my Grom. 85C is what I see often

 

[Ristur]

I have a cyl temp on a yx140 in a pit bike 340deg F is normal for it

340 Fahrenheit is 170 degrees Celsius so that checks out

 

[theogmantonio]

I found with thermal imaging that the stock oil temp sensor is inline with drainbolt temp by just a few degrees. I suppose I was only able to verify that with the bike on the stand though. However after only idling as well as running out the motor a little, temps were still inline with one another.

 

[Marts1414]

I found with thermal imaging that the stock oil temp sensor is inline with drainbolt temp by just a few degrees. I suppose I was only able to verify that with the bike on the stand though. However after only idling as well as running out the motor a little, temps were still inline with one another.

That is really good to know! At least we know getting oil temp from the drain plug should be fairly accurate

 

[mingo]

Thanks guys. I have since ditched the spark plug temp sensor and went with an oil temp sensor that read the oil from the drain plug. Koso makes the sensor.
View attachment 94051

What does the sensor plug into, where's the read out?