If the engine oil in your Honda CB Trigger is drying up quickly within a month, despite no visible issues like smoke, clean spark plugs, and no compression problems, there could be a few potential reasons to consider:
Oil Leak: Check for any signs of oil leaks around the engine, such as oil spots or residue on the engine casing or on the ground where the motorcycle is parked. Even a small leak can cause a significant loss of oil over time.
Incorrect Oil Grade or Type: Ensure that you are using the recommended oil grade and type for your motorcycle. Using oil that is too thin or not designed for your specific engine can lead to faster oil consumption.
Engine Overheating: Excessive engine heat can cause oil to evaporate more quickly. Check that the cooling system, including the radiator, fan, and coolant levels, is functioning properly to prevent overheating.
PCV Valve Issues: The Positive Crankcase Ventilation (PCV) valve helps regulate pressure within the engine and prevents excessive oil consumption. If the PCV valve is malfunctioning or clogged, it can result in increased oil consumption. Consider checking and cleaning or replacing the PCV valve if necessary.
Engine Wear or Damage: While you mentioned no compression issues, it's worth considering that excessive internal wear or damage to engine components, such as piston rings or valve seals, can result in increased oil consumption. If other potential causes have been ruled out, it may be necessary to have a professional mechanic inspect the engine for any internal issues.
It's advisable to consult with a qualified motorcycle mechanic who can perform a thorough inspection and diagnostic tests to pinpoint the exact cause of the oil consumption issue in your Honda CB Trigger. They can provide expert advice and perform any necessary repairs or adjustments to resolve the problem and ensure proper oil retention in the engine.