Got this reply from a tuner about egts from tuning. Opinions needed.
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towing my egts are 450c but sitting solo at 110kph = 350 if that.
Might need a dyno mego
i dont know why your so high when towing i get between 250 on the flat and 350 up hill or a tad higher in a head wind id take that grill out of the scoop and see if that makes a difference it must be restricting some air flow