Most experts recommend that you bleed motorcycle brakes about once every year. If you want to be safe, you may want to do it more frequently. In order to see if you need to bleed your motorcycle brakes, you should check the brake fluid. If the brake fluid is very dark, there is a good chance that it should be replaced. By bleeding the brake fluid, you will be able to improve the performance of your motorcycle brakes and make riding your motorcycle much safer overall. If you do not ride your motorcycle often, you could potentially go longer than a year.