They may last a day or a week, but they will never be as efficient as new. In most cases, the spark plug cannot be cleaned sufficiently to restore normal operation. They wear out just like oil, chains and sprockets. Remember that spark plugs are a maintenance item. All components of the electrical system must work within a specified range for the machine to operate well.Ĭleaning spark plugs may have been commonplace 30 or 50 years ago, but no longer. The high energy ignition systems of most modern motorcycles have very small tolerances.
Once a spark plug is fouled, it will not provide adequate voltage to the firing tip and the cylinder will not fire properly. Installing a spark plug with too cold of a heat range.Prolonged idling or continuous low-speed driving may be preventing the plug from reaching its optimum operating temperature leading to carbon build up.Improperly functioning ignition or charging system.Worn piston rings or valve seals may allow too much oil to leak into the combustion chamber, fouling the plugs with oil.The air to fuel ratio may be too rich as a result of incorrect carburetor adjustment, a dirty air cleaner element or a poorly performing fuel injection system, coating the plugs with gasoline.
