The only problem I ever have starting my 55 D is when its hot and the temp is hot and humid. Happened the other day, no start after 25 miles, 78 agrees F and 80% + humidity. Next morning 1st kick as is normal .I read last year here I think that condensers can be the culprit. So I dutifully swapped out mine for a NIB (from 1972) one, nice & shiny. Well its still 40 years old. I have new Amals, 12 volt Alton electrics, a good NOS Lucas coil etc. Would a modern condenser be the cure? thanks, Mike Whitney