Myself and Horse had a splendid ride out on the Zed this afternoon [1], the highlight of which was an RD500 whizzing the other way. I don't know what 2-stroke oil he was using, but the smell in the air for the next 1/2 mile or so was absolutely gorgeous. I doubt it was Castrol R, but the smell was pretty damned close. OK, it makes you aware of the amount of exhaust gasses that are out there, but if all exhaust gasses smelt like this, the world would be a happier place. [1] the only downside was some thick bint in a Merc trying to kill us by overtaking on a blind right hand bend right into our path. Actually, that's perhaps doing her a disservice; the idea to overtake may have come from whoever the thick bint was talking to on her mobile.
