It sounds like you may get away with a idle mixture adjustment.I'm not sure where the screws are located on your model,but they should be in front of the float bowls.Adjust in or out,with engine at operating temperature to,get the smoothest idle.Worst case,you may need to install larger main jets,but I doubt it,unless they opened the air intake also.Nice looking bike by the way.I love the look of the older bikes.I had the same mirrors on my G.Z. Good luck!

:rawk: