here is what I just found out about Yamaha performance report.
2320sl with a 200 hp;
rpm@4000-mph is 26.50,...gph is8.9,...mpg is3.0
rpm@5500-mph is 40.05,...gph is13.9,...mpg is2.8
2320sl with a 250hp;
rpm@4000-mph is 26.9,....gph is10.15,.....mpg is2.65
rpm@5500-mph is 42.1,....gph...