If your 1999 Suzuki TSR 125 has had water in its engine for more than 6 years, it's important to note that this is a complex issue that may require professional assistance. However, if you are determined to work on it yourself, here are some general steps to consider:
Assess the damage: Start by inspecting the motorcycle thoroughly to determine the extent of the water damage. Look for signs of corrosion, rust, or any other visible damage to the engine components.
Drain the water: Begin by draining any remaining water from the engine. This may involve removing the spark plug(s) and turning the engine over to expel the water. Ensure that the fuel system is drained as well, including the fuel tank, carburetor, and fuel lines.
Disassemble the engine: To properly clean and inspect the internal components, you may need to disassemble the engine. This can be a complex process, and it is essential to consult a service manual specific to your motorcycle model for guidance.
Clean and dry the components: Thoroughly clean all engine components using appropriate cleaning agents and tools. Remove any corrosion or rust carefully, ensuring not to cause further damage. Allow the parts to dry completely before reassembly.
Inspect and replace damaged parts: Inspect each component for signs of damage or wear. Pay close attention to gaskets, seals, bearings, and electrical connections. Replace any parts that show significant damage or signs of malfunction.
Lubricate and reassemble: Apply appropriate lubricants to the engine components before reassembling them. Follow the service manual for torque specifications and proper assembly procedures.
Test and fine-tune: Once the engine is reassembled, perform a thorough check of all systems. Ensure that all connections are secure, fluids are at the correct levels, and the electrical system is functioning properly. Start the engine and listen for any abnormal sounds or signs of issues. Adjust and fine-tune as necessary.
Please note that working on an engine with long-term water damage can be challenging, and it's advisable to consult a professional mechanic or experienced motorcycle technician. They can provide specific guidance, advice, and assistance throughout the process to ensure the best possible outcome.