I'm not too worried as I can turn something to fit. I need to look for my thread gauges. I wonder if this ever had the overflow pipe, as it seems the paint is present in the threads for this fitting, and having looked at another AV1 on the net I can't see a fitting on that one ???
Has anyone got any good suggestions for a silencer for this engine. I need something effective, to keep my neighbours happy, I'm also looking at the Petter air filter that seems to pop up on ebay. A somewhat more modern design, but takes filter cartridges.