I use the Jeti system's temp probes (MT-300), which will just about wedge themselves snuggly between the Saito cylinder fins and stay there without any further intervention. It's better if the probes' active parts face the back of the cylinders to avoid the cooling effect of the varying oncoming airflow messing with the measurements. The absolute measurement will vary from mounting point to mounting point. For me, wedging the probe between the top fins just below the spark plug works best. In a cowled and baffled install, the engine operates between 125 and 145 Celcius measured at those points.
Last edited by hpergm; 12-10-2021 at 10:38 PM.