The consequences of not revving up your engine when starting a motorcycle can vary depending on various factors, including the specific motorcycle model and its engine characteristics. Here are a few potential consequences:
Stalling: If you do not give enough throttle when starting a motorcycle, especially when the engine is cold, there is a higher likelihood of the engine stalling. This is because the initial fuel-air mixture might not be sufficient to sustain combustion, causing the engine to stop running. You may need to restart the engine or adjust the throttle to prevent stalling.
Increased Wear: When starting a motorcycle, especially a cold engine, the oil in the engine has not yet reached optimal operating temperature. Revving the engine slightly can help circulate the oil more effectively, lubricating the engine components and reducing wear on moving parts. Failing to rev the engine may lead to increased wear on internal components, potentially affecting the longevity of the engine.
Poor Fuel Combustion: If the engine is not revved enough during the starting process, the fuel-air mixture may not be adequately atomized and distributed throughout the combustion chamber. This can result in incomplete combustion, leading to reduced engine performance, decreased fuel efficiency, and potentially increased emissions.
Fouled Spark Plugs: In some cases, not revving the engine during startup can contribute to the fouling of spark plugs. When the engine is cold and the throttle is not opened enough, unburnt fuel residues can accumulate on the spark plugs, leading to reduced spark intensity and inefficient combustion. Over time, this can affect engine performance and require spark plug replacement.
Battery Drain: If you repeatedly try to start a motorcycle without revving the engine and it fails to start, you may put a strain on the battery. Continuous attempts to start the engine without giving it enough throttle can drain the battery's charge, requiring it to be recharged or replaced.
It's important to note that the specific starting procedure and requirements can vary between different motorcycle models. It's always recommended to consult the owner's manual or follow the manufacturer's guidelines for starting your particular motorcycle to ensure proper starting technique and minimize any potential negative consequences.