ZX5 gearing

[clarey]

im wanting to put a 10.5 brushless motor in my standard zx5 but im unsure on the correct gearing to use. can anyone help please?

[RogerM]

Id suggest starting on something like a 27 tooth pinion and check by temperature from there.

[clarey]

thanks roger, so if the temperature is hot, should i increase the pinion size or decrease?

[Neil Skull]

decrease