NGK Standard Spark Plugs. Shown below is an over torqued spark plug that sheered due to user installation error. NGK states that incorrect torque values are responsible for up to 90% of all spark plug warranty claims.
NGK Spark Plug DR8ES (5423)
2x NGK DR8ES-L 2923 Standard Spark Plugs For HONDA CX500 78-->84
4x NGK DR8ES-L 2923 Standard Spark Plugs For HONDA GL1000 (Gold Wing) 75-->79
4x NGK DR8ES Standard Spark Plugs For SUZUKI GSX1100 EFE/EF/EFF/EG/EFG 84>88
10x NGK BP6ES 7811 Spark Plugs Genuine NGK Copper Core-NEW with Signs of Storage
10x NGK BCP6ES 4930 Spark Plugs Genuine NGK Copper Core Fast Dispatch - NEW
