Rear Brake Master Cylinder Compatible with Polaris Sportsman 335 400 450 500 600 700 800. OEM Part Number: Compatible with 1911113 1910301 1910790. When installing, you must loosen the oil drain screw of the pump under the brake, and continuously press the brake foot brake pump to generate pressure, so that the oil of the brake pump passes through the oil pipe, enters the brake pump, discharges the air, and then tightens the oil drain screw. The brake system does not work without exhausting air. The mounting hole is 6.5MM, and the center distance of the mounting hole is 38MM.. The live cylinder diameter of the brake pump is 12.7MM, and the oil pipe screw is 10MM..
