Ah ?
Yes there is nothing like a old Duck motor, they were lovely sounding and looked great. But .................they were terribly short lived if run hard or poorly tuned.
A lot of mates had them and I always manged to show em on my R100cs ( mine had 40mm Delorto's and trick forks and flywheel from the factory) on anything but a billiard table smooth road. They rarely lasted beyond 40,000 km without a expensive trip to Ian Gowanloch, My R had 200,000 km and only cost a rotor for the alternator and valve guides at 120,000km.
All that complicated Desmo gear in the head and it revved no harder but made Ian a rich man. Later I got a Guzzi Lemans Mk3 which revved higher, had more power and was as bulletproof as the BMW.
I made the near fatal mistake once of riding my mates Ducati Pantah 600 to Philip Island. Thinking it would be okay as a newer generation motor and having been rebuilt only 3,000km earlier by Ian. The bastard machine had a conrod let go mid corner near Braidwood, which naturally stopped the motor dead and spewed chunks into the box and locked everything up. No clutch pull was going to help. And my sin was riding at a mere 130kmh. I somehow managed to stay upright and slide to a stop.
I laid in a paddock, watched the stars, smoked several special ciggies. And slowly thanked the stars for not letting a F..kin Ducati Kill me.
I am sure glad they don't make aircraft engines.