Castrol R30 engine oil.
That's the smell that used to be so common in the 60's, Gold Stars, Vipers, Venoms,Bonnevilles, Arials, Matchless, Royal Enfields, Douglas, Vincents, Fanny Barnets and a whole host of Villiers machines, that's what it is, it's the whole bike thing, loved 'em since as long as I can remember.
Bikes are all of their time, I mean, the Brough Superior was the Bees Knees at one time, imagine that ! Now we've got fuel injection, abs ,disc brakes that those bike makers of old could never have imagined but we loved each one we owned ( Mostly
![bothhands-meholdit-spanner :fix:](https://www.v-strom.co.uk/smf/Smileys/default/bothhands-meholdit-spanner.gif)
)
So I'd go with the smell of Castrol R, ah, memory lane.