What are the reasons for a motorcycle not starting after falling over?
2 Answers
The reason for not being able to start after falling over may be due to excessive gasoline entering the cylinder when attempting to start after lifting it up, leading to flooding and failure to start. The related explanations are as follows: Reasons for not starting: When the motorcycle falls over, some gasoline from the carburetor will flow out through the vent hole, and some will enter the cylinder. When lifting it up, too much gasoline enters the cylinder, causing flooding and preventing startup. Note that owners who do not plan to travel long distances should not fill the fuel tank to maintain gasoline freshness and reduce vehicle weight. Solution: Simply remove the spark plug, dry the gasoline on the spark plug, press the electric start to spray out the gasoline in the cylinder, and then reinstall the spark plug to start the motorcycle.
I've been riding motorcycles for over a decade, and whenever it won't start after a tip-over, nine times out of ten it's the tip-over switch being activated. This device is mounted on the side of the frame or under the seat, automatically cutting off the fuel or electrical circuit when the bike falls to prevent fire or explosion—a very practical safety feature. You'll need to locate that small button or lever to manually reset it—usually a simple press or push back will do the trick. Then check if the spark plug has come loose or gotten oily; the impact from tipping over can easily shake the connector loose, or the spark plug itself might be faulty and unable to ignite. The fuel line also requires careful inspection—the tank connection might have cracked and leaked, or the carburetor could have taken in water, disrupting the air-fuel ratio. The battery's negative terminal is a common point of looseness; just tightening it back up should restore proper power supply. Internal engine damage is less likely, but if it won't start after multiple attempts, don't force it to avoid worsening the issue. Start by resetting the switch and checking connections; if that doesn't work, towing it to a professional shop is the safer bet.
