What to Do When a Motorcycle Won't Start After Being Stored for a Long Time?
4 Answers
Before starting a motorcycle that has been stored for a long time, you can: Check if the motorcycle's switch is turned on and if there is gasoline in the fuel tank. Inspect whether the spark plug is igniting properly. If the ignition is unstable, clean the carbon deposits from the spark plug head. Gasoline that has been left unused for more than six months can develop gum deposits, making it unusable. Additionally, the battery is likely drained after prolonged storage, which can also prevent the motorcycle from starting. Before use, change the engine oil and lightly spray carburetor cleaner at the engine's air intake a few times to eliminate any rust caused by long-term disuse.
The most likely reason a motorcycle won't start after sitting idle is battery issues. I've encountered this several times - leaving it in the garage for just one month without riding completely drains the battery. Motorcycle batteries have small capacities and discharge particularly fast in cold temperatures. First, try slow-charging the battery for several hours with a charger. If the voltage measures below 12 volts with a multimeter, you'll need to replace it. After charging, check for loose or corroded terminal connections before starting - clean them thoroughly. Regular short rides or using a battery maintainer can prevent this. If the battery checks out but it still won't start, examine the fuel system or spark plugs. Safety first - don't force ignition and risk damaging the starter.
My old motorcycle had difficulty starting after being parked for three months, and I found out it was due to deteriorated gasoline. Gasoline can oxidize over time, forming gum that clogs the fuel system, especially ethanol-blended gasoline which evaporates more easily. I had to use a fuel pump to drain the old gasoline, clean the fuel tank, and then add fresh gasoline mixed with a fuel stabilizer. If the engine coughs and fails to ignite during startup, it might be due to a dirty carburetor or fuel injector. A simple spray of cleaner or disassembly for cleaning should suffice. Next time before storage, fill up the fuel tank to minimize air contact or use a professional fuel additive. Motorcycles are lightweight but their systems are sensitive; regular short rides are the most cost-effective and hassle-free solution.
Difficulty starting after prolonged storage is often due to spark plug or ignition system issues. Upon inspection, I found carbon deposits or moisture on the spark plugs causing ignition failure. Removing them, cleaning the electrodes with a wire brush, adjusting the gap, or replacing the spark plugs for a few dozen bucks can solve the problem. Also, check the ignition coils and wires for any leakage, and ensure the grounding wire is secure to restore functionality. Additionally, inspect the fuel tank and pump to ensure proper fuel supply. A simple trick: push the car to a small slope, coast in second gear, and release the clutch to start—sometimes it works but can harm the vehicle. For maintenance, start the engine monthly and let it idle for a few minutes to keep parts lubricated and prevent rusting.
