RE: Welcome to Club SAITO !
If someone gave you a figure you would most likely be chasing your tail trying to measure it and truly feel you knew what you were doing.
The problem is that a Saito will measure all different temps across the top of the head in the rear.
The hottest point is right where the exhaust pipe comes out,
The value is <300F
But with your IR gun you need the emissivity set correctly on your gun for unpolished aluminum stained with castor oil