NGK D8EA Spark Plug XL250, F650 etc.
NGK D7EA Spark Plug Honda TL250, BMW etc.
NGK DR8ES-L Spark Plug Honda TLR200 TLR250
Boyer Bransden Micro Digital Ignition BSA/Tri Singles sidepoints
Champion N5C Spark Plug Long Reach
Champion N4C Spark Plug Long Reach