umm yea..... you may also want to read in your OM that you have a wet clutch set-up. This means that your engine oil is also your clutch oil. You need to get SPECIAL oil for wet clutches. NOT the oil from walmart for cars. Best suggestion would be to go to a dealership/bike shop and get your oil from there. brand wise, it is all about the same. Whether it is conventional, semi-syn, or full synthetic, MAKE SURE it is for a 4 stroke wet clutch system.
IMO though i would just go with the conventional yamalube. Its about 4.50 a quart, and is the exact same stuff the yamaha dealerships use in their oil changes. Besides, going full synthetic is useless unless you have a very high performance engine, for you have to do an oil change every 2000-2500 miles anyway, no if's, and's, or but's about it