There could be several reasons why a motorcycle won't start after an oil change. Here are a few possibilities:
Low Oil Level: If the oil level is too low after the oil change, the motorcycle's engine may not have enough lubrication to start properly. It's essential to ensure that the correct amount of oil has been added according to the manufacturer's specifications.
Incorrect Oil Type: Using the wrong type of oil or oil with the wrong viscosity can affect the engine's performance and cause starting issues. Make sure you've used the oil recommended by the motorcycle's manufacturer and that it meets the required specifications.
Improper Oil Filter Installation: During an oil change, the oil filter is typically replaced as well. If the oil filter is not installed correctly or if the old filter's gasket gets stuck, it can cause oil leakage or improper oil flow, which may affect the engine's starting process.
Air Lock: Sometimes, air can get trapped in the oil system during an oil change, leading to difficulties in starting the motorcycle. This can occur if the oil is not properly circulated throughout the engine. To resolve this, it may be necessary to prime the oil system or remove any air bubbles that may have formed.
Unrelated Issues: It's also possible that the starting issue is unrelated to the oil change itself. There could be an electrical problem, a fuel delivery issue, a faulty spark plug, or other mechanical problems that coincidentally occurred around the same time as the oil change.
If your motorcycle doesn't start after an oil change, it's best to double-check the oil level and type, inspect the oil filter installation, and ensure there are no air pockets in the oil system. If the problem persists, it may be necessary to consult a qualified mechanic or contact the motorcycle's manufacturer for further assistance.