Well if the Tanks been made by Bill Simpson in Scotland the one I got Dallas will fit and they also fit the 851, Paso and the 750/900 early Supersport
Very similar to this one, which is from the shop at Castle Combe but slightly smaller
http://www.merlinmotorsport.co.uk/p1...duct_info.html Just measure mine 120mm OD, 8 fixing screws on a 102mm PCD
Made by Newton Equipment reference is AIRFIL 4
And
A400 No Lock 8 Hole Flange --- A48S