More on the Picador and it's developments effects on racing components , Lightning sustained reliability at high revs . Because of the aircraft s need for sustaining high power at elevated revs during flight it's program of development led to the two speed oil pump drive worm , Vibrac con rods , caged roller bearing big ends , harder steel in flywheels and main shafts , the steel big idler and it's one piece shaft and support pedestal . All of these components lent greater reliability for racing and sprinting activity and were available for sale across the Spares counter , so really improving the motorcycle . All would interchange with touring pieces and most were encorporated into the Black Lightning and Grey Flash . They were offered for sale at George Brown s shop right across the way from the factory . A pal bought me several of these items there during the mid 50s . Sid .