Using these ignition cover plugs is easy. First, make sure your bike's engine is cool. Use a hex key to remove the old plugs from the ignition cover. Then, take the new AS3 plugs and carefully insert them into the holes. The rubber O - ring helps keep them sealed. When it comes to maintenance, check the plugs occasionally for any signs of wear or damage. If they look okay, they'll likely keep working well. Just keep in mind that they're designed for specific Husqvarna models, so don't try to use them on other bikes. Also, don't overtighten the plugs when installing, as this could damage the cover. With proper use and care, these plugs should last you a long time, thanks to the 12 - month warranty.