* Oil type: Synthetic oils can have different properties than conventional oils, such as a different viscosity or friction coefficient. This can cause your bike to run differently, especially if the oil is not compatible with your bike's engine.
* Oil level: If you overfilled the oil tank, this can cause the oil to foam and create air pockets in the oil system. This can lead to a loss of power and backfiring.
* Engine temperature: Synthetic oils can sometimes cause your engine to run hotter than conventional oils. This can lead to a loss of power and backfiring if the engine is not properly cooled.
* Air filter: If your air filter is dirty or clogged, this can restrict airflow to the engine and cause a loss of power and backfiring.
* Spark plug: A worn or damaged spark plug can also cause a loss of power and backfiring.
If you have recently switched to synthetic oil and your bike is losing power and backfiring, I would recommend checking the following things:
* Check the oil level: Make sure the oil level is correct.
* Check the oil type: Make sure the synthetic oil you are using is compatible with your bike's engine.
* Check the engine temperature: Make sure the engine is not running too hot.
* Check the air filter: Make sure the air filter is clean and not clogged.
* Check the spark plug: Make sure the spark plug is in good condition and properly gapped.
If you have checked all of these things and your bike is still losing power and backfiring, I would recommend taking it to a qualified mechanic for further diagnosis.
