A ticking noise on your CBR 125R can indicate several potential issues. Here are a few possible causes and solutions:
Valve Clearance: The ticking noise could be related to improper valve clearance. Over time, the valves may require adjustment to ensure proper clearance. It's recommended to consult the bike's service manual or a professional mechanic to inspect and adjust the valve clearance if needed.
Cam Chain Tension: The ticking noise might be caused by improper tension in the cam chain. If the chain is loose or worn, it can create a ticking sound. Adjusting the cam chain tension or replacing a worn chain may resolve the issue. It's advisable to have a professional mechanic inspect and address the cam chain tension if necessary.
Exhaust Leak: An exhaust leak can cause ticking or clicking noises. Inspect the exhaust system for any leaks, loose connections, or damaged gaskets. Tighten loose connections or replace damaged components to eliminate the source of the noise.
Lifter Noise: Ticking sounds can sometimes be associated with the hydraulic lifters or tappets. If the lifters are not properly adjusted or if they are worn, they can create noise. A mechanic can inspect the lifters and adjust or replace them if needed.
Other Mechanical Issues: Ticking noises can also be caused by other mechanical issues, such as loose or worn components, improper lubrication, or a damaged bearing. A thorough inspection by a professional mechanic can help identify the specific cause and provide appropriate solutions.
Given that the noise appears to go away at higher speeds, it's possible that the issue may be related to engine RPM or load conditions. However, it's important to address any unusual noises to prevent potential damage or further complications.
To ensure accurate diagnosis and appropriate resolution, it's recommended to consult a qualified motorcycle mechanic who can perform a detailed inspection and provide specific recommendations based on their findings.