Thanks for your reply Phil, I think I have that write up somewhere, however I’ll be storing the link. The one on eBay is quite a large bore, the largest one I fitted was 1 1/4 “ on a bored out 200cc scooter. I made a wooden pattern with core box and had an aluminium manifold cast to fit. I’ve still got the pattern! In its time that scooter moved! I’ll hang on to the one in the picture as a reminder of happy days!
