Yamaha Ignition Coil

The Arrowhead range includes a line of high quality electrical parts and components for scooters, road and off-road motorcycles offered at particularly affordable prices. Among the many proposals in the Arrowhead catalog, the widest aftermarket range of starters, ignition kits and alternators stands out

What are the symptoms of a failing coil?
All of these could be from a single coil or multiple coils depending on the vehicle:

• When the coil starts to go bad, you will notice reduced gas mileage. You’ll experience diminished performance and more frequent fill-ups at the gas station. The engine just does not burn all the fuel it needs. If the ignition coils are not firing, the engine just simply cannot burn fuel fast enough.
• The engine turns over easily, but has difficulty starting, requiring you to hold the key in the start position much longer than normal.
• The engine starts misfiring, causing sputtering and jerking.
• The engine starts misfiring, causing sputtering, jerking, backfiring, and check engine light is on.

What causes an ignition coil to go bad? 

• Normal wear and tear or exposure to the elements is the number one reason.
• Damaged or poorly functioning spark plugs.
• Engine vibrations caused by poorly functioning spark plugs.
• Moisture.