Cause of backfire or popping back.

[Peter Naulls]

I spent a while last night cleaning and re-cementing the join between the downpipe and silencer. There was no significant evidence of a leak but it'll be another possible cause ruled out. I'll test it this evening; I have an old school friend visiting who has just bought (but not yet collected) his first Seven. I've a feeling he's going to expect a driving lesson.