the split inlet will have a big effect on the running of it mate so replace that straight away,wind the mixture screw in all the way then undo it 2,5 turns thats roughly what it should be ,then try it again and if it still cuts out with the new manifold then you need to check your jets in the carb again and also check the fuel tap is operating properly.
adam bike doctor(of milton keynes motorcycle centre)
February 2011