I took my Zaffy in for a service and cam belt change this week to a little garage in the New Forest. When they put it all back together it was misfiring they said that the coil pack had probably gone. It was running fine when I dropped it off. He ordered a new coil pack and fitted it but it was still misfiring. He eventually phoned me back and said that they had found a broken wire that they must have damaged so the coil pack was'nt required thus saving me 100 big ones. Kinda restores you faith in human nature does'nt it.