Spark plug NGK DR8ES 5423 thread length 19mm Nickel Gwint M4 fits: HONDA CB 400 1974-1985. Spark Plug Connector Type M4. Spark Position [mm] 1.6. with gasket seat. Engine 400T Engine codes - Production years 1983/01 - 1983/01 kW n/a hp n/a ccm 400.
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