yeah I was thinking 130 will be more like it, try it WOT when you can and see what its like, buy a few genuine mikuni jets from allens they arent expensive, start with 140 if you like and go down in 5's from there watching plug colour and feel / temperature 130 is actually 6 sizes smaller...they increment in 5's at this size
as you know, you should fit the biggest one that it will run sweet with at WOT