It promotes the benefits of copper spark plugs over iridium ones. Although Accel has a 4.5-star rating on Amazon, one reviewer pointed out that these copper plugs only last about half as long as ...

So, let’s review the tools you’ll need, the steps you’ll take, and some signs that your bike is ready to swap its plugs out. Promoted Product: Drag Specialties Iridium Spark Plugs Spark ...