My name is Nick Smith. I founded Queen City Scooters(QCS) in 2018. Since then we have expanded to include fleet services, safety instruction classes, limited repair services, and our biggest pride - being the only distributor in North Carolina out of a dozen to be awarded a dealer contract with Segway Ninebot Robotics; the original pioneers of the micro-mobility industry and without question the gold standard as well as the addition of the VoroMotors family; a real powerhouse in setting new micromobility performance standards.
You need the lines full of the mineral oil (fluid) for the brakes to work so he leaves the fluid in. Hydraulics works by you transferring force by the liquid, so when you press your handle it sends pressure through the fluid in the line that then pushes the brake pads together. If you take the fluid out and just have air, you will press the brake handle and nothing will happen. If you have insufficient levels of fluid, you will press the brake handle and you will get some braking but very little.