Hello, I've spent I don't know how many hours searching and applying what I learned here about jetting the YZ400F. Got it running *ok* but I'm done messing with this carb It was recommended by a vendor here that I upgrade to a newer model carb to easily solve most of the problems associated with the 99' model FCR. Does anyone know which year YZF to get a carb from that will not necessitate a change in airbox or intake runners? What year bikes had the same diameters at the airbox and intake? I'm considering the Edelbrock too but if I found the right FCR for a good price, I'd prefer to go that route. I really like this bike - don't want to sell it.