Review on Hydraulic Brake Lever Master Cylinder Sight Lens 18mm - (Set of 2), Premium Replacement Kit with O-Rings by Precision Auto Products by Matthew Nielsen

I tried to clean the service glass on my quad's front master cylinder and found it was soft and leaking brake fluid. The local dealer said I had to buy a complete handbrake assembly for about $70. I kept looking and found these and thought I'd give them a try. It took about 10 minutes to fix the leak. Just touch the old one by slightly heating the heat gun and the ring and gasket will be easy to remove. Clean the hole and install the new glass and ring with a clamp and wood. When properly aligned, it pushes straight. Then you are ready to drive. I would like to add that this 18mm lens is exactly the size you need if you can fit a coin in the master cylinder hole.