RE: Safe to use DuBro Soft mounts for my Saito 125 ?
The DuBro 688 mount can be used with that engine. You did not say if you were concerned about the engine vibrating, which in my experience Saitos do until well broken in, or if it is transmitted vibration to the airframe. If it is vibration of the airframe it should help but if its just that 1.25 doing the Saito shake , well that will probably lessen after a few gallons/hours on the engine.