Gugman Itfits in 144001, 124018 and 124019. They all use the same parts in all cars except the 144001 is a shorter chassis and main drive shaft. They also fit in the 124016 and 124017.

Xxpedop 1730632,this product id,3660 80a brushless combo,it is recommended to run on 3s,you also neeed to change transmitter

AndresA4BFive It's way more reliable on 2s battery. You should choose a motor with atleast 80A and lower kv like 2300

Exclave 3900kv motor is recommended for upgrading wltoys 124019

jakel1977 higher kv more rpm lower kv more torque 124019 is fairly light so less torque needed 👍

Mugwump Yes,these pinion gears are suitable for 3660 brushless combo

Partocracy As for motors: 1.3650 means the motor diameter is 36mm,length is 50mm.3665 means the motor diameter is 36mm,length is 65mm 2.The shaft diameter can see the picture and details. 3.If the motor shaft di... As for motors: 1.3650 means the motor diameter is 36mm,length is 50mm.3665 means the motor diameter is 36mm,length is 65mm 2.The shaft diameter can see the picture and details. 3.If the motor shaft diameter,voltage,current is the same with your old motor,the motor can use with your car. 4.The KV number is more higher,means this motor is better for crawler rc car,the drift rc car or high speed rc car should use the lower KV motor. You need to measure your motor and buy a new one. See More

Antechapel No,124019 original motor shaft diameter is 3.175mm