NGK LB05F 90 Degree Resistor Spark Plug Cap 5k ohm resistance Plug Cap for models with Electronic Ignition Can be used on any Classic Vespa or Lambretta E is for terminal nut F is Terminal stud. This item has been discontinued in the USA Presently scrounging around trying to get these discontinued caps from Europe. Either NGK LB05-E or LB05-F will work. You will have to remove the screwed on tip (terminal ferrule) on the plug with the "F" Cap LB05F caps fit conventional spark plugs with terminal ferrule removed like the NGK B*HS / B*ES 90 Degree Resistor Spark Plug Cap 5k ohm resistance Plug Cap for models with Electronic Ignition Can be used on any Classic Vespa or Lambretta E is for terminal nut F is Terminal stud. Either NGK LB05-E or LB05-F will work. You will have to remove the screwed on tip (terminal ferrule) on the plug with the "F" Cap LB05F caps fit conventional spark plugs with terminal ferrule removed like the NGK B*HS / B*ES
