Welcome to my retirement sale – GF Racing UK Northern Workshop. VFR400 NC30 and RVF400 NC35 part used. TIME SERT® Würth M8 x 1 Spark Plug Thread Repair System. 3 x new Inserts – 11.7 mm length. Wurth M8 x 1mm tap so you may recover the plug thread without needing a new insert. Genuine used NGK ER9-EH plug for test purposes. Complete with it’s original Wurth instruction / guide sheet – pics now added – I forgot! Will suit many other applications??