X60 getting hot

[Clarkie]

After some advise, I have a x60'with the following

Orion r10 speedo in blinks mode
Thunder power 7.5
81 tooth spur
21 tooth pinion

And my motor is getting HOT 180f.. Esc is fine temp wise

Should I change spur down and pinion up??

What are others running with temps ok!,

Don't really want to fit a fan to solve heat issues if they can be avoided.

Cheers
Paul