G'day Ken
You have covered just about every thing - here is a sugestion.
Go to a hotter plug , W8DC - Bosch - N11YC Champion - W16EP-U Denso about $10.00 from your Auto Store / these are protruding plugs to get the nose in the flame front - If your problem persists get the Maggy looked at(I know you said the Mag is OK )(I had a Mag that would start and throw a good spark but it would start to play up off idle and when riding - around town the plugs would start to foul up and give a rich appearance - finally the Mag gave up the ghost after 6 Mths - still started ok , but wouldnt drive the bike)
Greg
You have covered just about every thing - here is a sugestion.
Go to a hotter plug , W8DC - Bosch - N11YC Champion - W16EP-U Denso about $10.00 from your Auto Store / these are protruding plugs to get the nose in the flame front - If your problem persists get the Maggy looked at(I know you said the Mag is OK )(I had a Mag that would start and throw a good spark but it would start to play up off idle and when riding - around town the plugs would start to foul up and give a rich appearance - finally the Mag gave up the ghost after 6 Mths - still started ok , but wouldnt drive the bike)
Greg