If you notice small amounts of fumes coming from your new Gixxer 250 SF motorcycle when you stop, it is worth investigating the issue further. While I can provide some general information, it's important to note that diagnosing the specific problem would require a professional inspection by a qualified mechanic. However, here are a few potential reasons for the fumes:
Normal operation: It's normal for some fumes to be emitted from the exhaust of a motorcycle, especially when the engine is running and after prolonged or spirited riding. These fumes typically consist of hot gases and small amounts of vaporized fuel. They should dissipate quickly and not be a cause for concern.
Burning off protective coatings: Motorcycles, especially new ones, often have various protective coatings applied to components such as exhaust pipes and engine parts. During the initial break-in period, these coatings may heat up and emit fumes as they burn off. This is usually a temporary issue and should diminish over time.
Oil or coolant leakage: If the fumes have a distinct smell or appear to be bluish or white in color, it could indicate a potential oil or coolant leakage. Check for any signs of fluid leaks around the engine, exhaust, or other relevant areas. If you suspect a leak, it's crucial to have it inspected by a mechanic as soon as possible to prevent further damage to the engine.
Improper fuel mixture: If the motorcycle's fuel mixture is not properly adjusted, it could result in incomplete combustion, leading to fumes and potentially a noticeable smell. This issue may require tuning or adjustment of the fuel injection or carburetor system by a professional technician.
Other potential issues: There could be other factors contributing to the fumes, such as a malfunctioning emission control system, a clogged air filter, or an exhaust system problem. These issues would typically require professional diagnosis and repair.
To ensure your safety and the longevity of your motorcycle, it is recommended to have the issue inspected by an authorized service center or a qualified mechanic who can thoroughly examine the bike and provide an accurate diagnosis. They will be able to address the specific problem and offer the appropriate solution.