I would like to ask something. I'm going to apply my ATV remote steering. I'll mount this motor to the part of the steering system which is shown in the first picture with "number 2"(steering bar). Is this be able to turn my steering wheel? [How to: I will add both motor and the bar a cogwheel or something. And the motor will be fixed to the ATV's frame near the steering bar, parallel to it.]ATV is 68 kg:

I'm happy with your other engine suggestions.

 

That might work with a gearbox on it. Easier to start with a cordless drill motor

 

The answer is in the motor's specification; is 0.34kg/cm enough torque to turn the steering on your ATV?

 

That motor will need a massive reduction ratio to gear it correctly for speed of movement of the steering, but the gearing will present a lot of torque working against you if you also need manual steering. Are you intending to have a clutch/disconnect arrangement?

 

The answer is in the motor's specification; is 0.34kg/cm enough torque to turn the steering on your ATV?

No, it isn't.

That motor will need a massive reduction ratio to gear it correctly for speed of movement of the steering, but the gearing will present a lot of torque working against you if you also need manual steering. Are you intending to have a clutch/disconnect arrangement?

I unserstand. Yesterday I realized that and diceded to use servo motor which has high torque through its gear. But I couldn't find servo motor with a torque higher than 100 kg-cm. Then I took an advice to use linear servo which has enough power. So my steering mechanism has changed.
Circular servo steering(which has 180kg-cm torque. He sells for 700$:

And linear servo steering:

 

No, it isn't.


I unserstand. Yesterday I realized that and diceded to use servo motor which has high torque through its gear. But I couldn't find servo motor with a torque higher than 100 kg-cm. Then I took an advice to use linear servo which has enough power. So my steering mechanism has changed.
Circular servo steering(which has 180kg-cm torque. He sells for 700$:

And linear servo steering:

But the linear actuator is verrrrrry slow.