How to Select a Modified Motor for your Ride-On Vehicle
Selecting the right motors for your ride-on is based on how much voltage you're going to put into them and whether you are looking for more torque for tall grass, hills, and demo derbies, or more speed.
Most ride-ons use 550 motors. That refers to the physical size of the motor. Power Wheels brand vehicles are also designed to accomodate 775 motors as well.
The speed of a motor is based on the number of Turns. This refers to the copper wire wrapped around the armature inside of the motor. The less turns a motor has the more top speed it delivers but at the cost of low-end punch. Using a very low turn motor in a vehicle going through grass, up steep hills, or that is very heavy will burn up the motor. Much like trying to start your real car in 5th gear. Power Wheels has never disclosed the number of turns on their motors but we suspect it is around 27. The number of turns that a 550 motor has does not correlate to the number of turns a 775 has as far as top speed.
Some motors have a "Reverse Rotation" companion option. This doesn't mean the motor spins backwards when power is applied. It refers to the timing of the motors. Motors can be "timed" so that they go faster in one direction then the other. Power Wheels vehicles have one motor spinning forward and one spinning backwards. So having one motor that spins forward and one that spins equally fast in reverse is a slight advantage in those vehicles.
Volts - The voltages listed on our motors are manufacturer recommendations. Many many people run the 14 volt motors at 18 volts with no problems. We've also never heard of a problem running our 775 motors at 24 volts (very commonly done).
Pinion Gears - That's the gear on the motor. The motors that come with ride-on cars have pinion gears that are press-fit and not reusable. You will need to purchase pinion gears that have the same number of teeth as the ones on your existing motors. They are linked in each motor's desciption page. 550 and 600 motors use 3mm pinions, 775 motors use 5mm pinions.
In the end it's up to you to decide which motors you want to try. Remember you're modifying your vehicle which voids all warranties. Modifying your car also runs the increased risk of blowing things up like gearboxes and switches and motors.
550 Motor 21 Turn 14 Volts & Reverse Rotation -These motors work great in Power Wheels brand vehicles and other vehicles that have identical gearboxes with the motors both facing inwards. The Reverse Rotation motor goes on the passenger side of the vehicle. They are a great inexpensive speed boost for on & offroad use.
550 Motor 23 Turn 14 Volts - If you're looking for off-road power to go through tall grass, up hills, through mud, hauling trailers, or demo-derby driving these motors will give you that low-end power you need. Still faster then stock motors as well. Neutral timed.
775 Motor 10 Turn 16.8 Volts -These big bad boys are optimal when you are running a vehicle at 18-24 volts. They are all about torque to keep your wheels spinning under any condition. On Power Wheels brand vehicles you will need to get the 775 Mounting Screws as they are a larger diameter then your stock screws.