If you're having trouble bleeding the rear brake on your KTM motorcycle, here are some steps you can take to troubleshoot the issue:
Check the brake fluid level: Ensure that the brake fluid reservoir is filled to the correct level. If it's too low, it can introduce air into the system and make bleeding difficult.
Verify the bleed screw: Make sure the bleed screw on the brake caliper is fully closed. If it's not tightened properly, it can allow air to enter the system.
Use the correct bleeding technique: Start by attaching a clear plastic hose to the bleed screw. Submerge the other end of the hose in a container filled with brake fluid. Slowly pump the brake lever or pedal a few times and hold it down. While holding the lever or pedal, open the bleed screw slightly to release any air or fluid. Close the screw before releasing the brake lever or pedal. Repeat this process until you no longer see air bubbles in the fluid.
Consider gravity bleeding: If traditional bleeding methods aren't working, you can try gravity bleeding. Open the bleed screw and let gravity force the air bubbles out of the system. Keep an eye on the fluid level in the reservoir and top it up as necessary. This method takes longer but can be effective.
Check for leaks: Inspect the brake lines, caliper, and connections for any signs of leaks. A leak in the system can introduce air and prevent proper bleeding. If you find any leaks, address them before attempting to bleed the brake again.
Seek professional assistance: If you've tried these steps and still can't bleed the rear brake, it may be best to seek help from a professional motorcycle mechanic or authorized KTM service center. They will have the expertise and specialized tools to diagnose and resolve the issue.
Remember to always follow the manufacturer's instructions and safety precautions when working on your motorcycle's braking system.