My yamaha ybr. Break light does not show when I use front brake,only shows when use rear brake

check for bolt holding the arm on the shaft
remove it and then you may use a chisel or other lever to spread the boss to slide it off the splines

Check the fuse, If it is blown check wires to rear brake light to see if any wires are frayed and grounded. Some tmes the wires under rear fender will hit the tire and may need repair. Also check bulb and socket.

Please check the brake switch and relay for malfunction

take a look at the pad you should have at least 1/8in of pad. if all you see is a metal plate, then you have gone to far and need to replace the pads, the front brakes do about 70% of the breaking under normal conditions, emergency they do about 80 to 90%.

adjust the rear brake light switch. you will find it on the right connected to the brake pedal by a rod and spring

Take the wheel off and remove the brake hub. Now clean out all the dirt and mud from riding in the creek and through mud puddles. The brake shaft has dried mud on it and can not rotate freely in the hub. You will probably need a plastic hammer to punch it out of the casing. clean the shaft and the casing hole the shaft goes through. Grease the shaft with waterproof grease.

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