alright jack,this is the first time i've ever posted anything on here,(new you see!).i've been designing and making various new parts for the xs650,started messing around making various one off parts when i was in my early 20s,now i'm having a more dedicated effort.the one into two inlet manifold is my latest design, it's cast in aluminium with a flange mounting that will take a standard xs carb rubber centered between the two pots for even distribution.this setup is for anyone who has the ability to modify the backbone of the frame or get it done proffesonally. im also making another manifold that bolts on in place of the carb rubber which comes out on the left hand side at 50 degrees which will miss the backbone, i'm making different flanges for fitting different carbs and these will be tig welded on. i will give you a shout when i'm ready to sell them, i'll probly put them on e-bay, thanks and all the best melv.