What is the maximum power on a Polaris 114 EQ-D telescope?
Depending on optical quality and observing conditions, you can expect to get anywhere from 20x to 50x of useful magnification per inch of aperture. In other words, a 4-inch scope tops out at 200x under ideal conditions, but a 6-inch scope can work well as high as 300x under ideal conditions.
The meaning of the question is not clear. However, I suggest that the only limitation is the instrument used to measure the mass. Most instruments with very high precision will also have a low maximum mass that it can measure, while a low sensitivity instrument will have a high maximum. The answer, therefore, depends on the both: the maximum mass and the precision.