I ran mine on kit gearing...
Novak 4.5 sintered.. speedo was warmish and the motor was easily touchable after a 5 min run outside in the sun.
Iv cut both the flaps out to aid cooling as well.
Is your 5.5 sintered as it does make a real difference.
Also if you can live with it, turn the drag brake down to 20 % setting. I also find that the car is a lot smoother as it still retains its speed through corners rather than braking as soon as you let the power off.
Hope this helps.
Col.
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