I'm not gunna tune by temp or anything like that, I'm checking just to make sure it doesn't overheat when idling for 15 mins.If you must temp check, get a really good IR thermometer if you don''t have one already. The best one I've ever used is a Nebo Tempra (https://www.amazon.com/Tempra-thermometer-EdisonBright-batteries-bundle/dp/B01JRHJDP4). It's truly amazing! It has 3 emissivity modes so you can get an accurate reading on any surface, a laser and a built in flashlight. It's stable, accurate as hell and worth more than double the $50 price tag. You would typically want to take a reading as close to the spark plug as you can, and as soon after stopping as possible. Otherwise the case will load up and start cooling your motor very quickly. Some people opt to measure the crank case temp instead, but that won't give an accurate head temp, which is where all the magic happens.
But in all honesty, you shouldn't need to check your temps on a motor that size. Just listen to the sound and keep an eye on the plug color after break in. You never see 2 stroke motocross guys tuning on temp. It's all about feel. If you're running too lean, the engine will sound kind of dry, like it's winding out, and will struggle to hit the top of its RPM range. If it's too rich, it will make a burbling sound and struggle to hit the top of the RPM range. If your motor tops out without sounding like it's struggling, you're good to go!
As for upgrades, you know me man. I'm all about running what you have until you break shit. Once it's broken, then I'll upgrade. I'm still running the stock 4mm shocks for hell's sake! And I've taken my truck through some seriously stupid beatings and a lot of big air. I'll tear her down between big runs to make sure the bearings are all good, and the shocks are topped up. So far, I've only had to upgrade the A-arms, drive shafts and drive boots due to breaking stuff. All my other upgrades are pure performance and quality of life stuff.
I'll eventually kill the poor drive cups and need to replace the drive pins. And I'm honestly hoping my engine upgrade gives me an excuse to get some more bits, but if she holds up, I won't bother.
But hey, in the end, this hobby is about the pure joy of running and wrenching these bad boys. Do what makes you happy, and share your results!
TLDR: Don't need temp gun; just fekkin' enjoy yourself! We won't judge!
Derp! My bad, didn't even think you would just be idling. Nevermind me!I'm checking just to make sure it doesn't overheat when idling