Originally Posted by LaserPimp

I can't condone anyone buying a clone esc from hobbyking. I can't comment on the quality as I've never used one, I wouldn't use one because they are stealing designs from manufacturers that have put time, effort and money into development. When you buy an esc you are not just paying for a bunch of circuitry an capacitors, you are paying for the R&D that is required to bring us quality products.

Originally Posted by PetRock

The manual on the HK site says:

• Sensored or sensorless brushless motors
• 2s lipo: >=3.5T onroad, >=5.5T offroad
• 3s lipo: >=5.5T onroad, >=8.5T offroad

The fastest motor I've run mine with is the 6.5T in my D413 now - I've had zero problems with it.

Originally Posted by PetRock

Any brand that sells a 3-wire brushless motors with an optional sensor port: typically labelled as "540" or "550" size (3650 or 3660 cans). Once you get into the 550/3660 sizes or larger (3674, 4074 etc): you'll need to look at the voltage: if they're for 1/8-scale they usually need 4S-6S lipos... the X-Car 120 is only designed for 2S or 3S (which are more common in 1/10th-scale, with 2S being what's using in racing classes)

In general, for the X-car, you can use any brushless motor that says it's designed for 1/10th-scale RC cars running on 2s: where the common motors are rated at between 3500-5500kv