In February I asked for tips on starting my problematic CD175 and tips were generously given, gratefully received and acted on - thanks to one and all. But no cures.
By pure coincidence I met someone who'd experienced a similar problem with his CD175 and eventually he pinpointed a defective coil although it was brand new. So he put back the tatty looking original and away the bike went.
Luckily I still had my original and did the same with same result, better starting and smoother running. Boom Boom job's a good 'un!