B9ES (6103324) Spark Plugs are a critical engine component that provides the spark that ignites the air-fuel mixture that drives an engine. NGK Spark Plugs feature a trivalent plating, a silver-or-chrome colored finish on the threads is designed to provide corrosion resistance against moisture and chemicals. NGK Spark Plugs are designed to meet or exceed OE standards- this means that all NGK spark plugs will meet the specifications set by the manufacturer of your vehicle. To Fit - APRILIA - Assorted Older Models HARLEY DAVIDSON - Assorted Older Models HUSQVARNA 390 MX HUSQVARNA 400 MX HUSQVARNA 430 CR KAWASAKI KX 80 1981 - 1982 KTM 500 DXC KTM 500 EXC KTM 540 MX YAMAHA YZ 50 YAMAHA YZ 50 H YAMAHA - Assorted Older Models