Yesterday (Fri) I was about to scoot off to work on Sofia when she decided that idling wasn’t her cup of tea and refused to do so. She would start and I could keep her running with the throttle but she sounds distinctly chuffy and flat.
I thought she had blown the exhaust gasket so I was given the go ahead to take Francesca instead and I spent time today intending to change the gasket. However, on inspection it was clear that the problem lay elsewhere. I spoke to a local friend/guru who suggested HT problems, so I took the plug lead off and removed the coil and checked for continuity which is good across the coil and to the plug cap. I also pulled the plug out - oh for smaller hands - and it was wet so I dried it, tested for spark which was strong and consistent, and reassembled it all.
Started her again and no change.