請教有關油車改電車問題

it should be Mod 1 gear,
HW's pinion gear -> not tough enough
-> use novak

also overheating the motor is a main problem
cannot use 540 size motor, need to use larger torque motor...
Tried Losi Xcelerion 1/8 2100kv (very good) and HW 1/8 motor which is too low efficiency
Good Luck

novak has 5mm bore Mod 1 gear, i bought it before from Kwun Tong directly