SL650 problems

ok I have a 95 sl 650 (tripple cylinder) I rode it last summer and it ran great until the gas cap cracked got water in the tank and sucked it through th carbs. Then it sat with water in the carbs for about 2 weeks, I cleaned them all out. and got it running. it was running great out of the water but when we put it in the water it would not rev and we would only go about three-5 mph, took the carbs off and cleaned them, put them back on and it would run a little faster but not much. They all get good spark. the first towo plugs are loaded and the front cylinder is running way lean. what could be the problem??? i dont want to be out $1600.
 
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