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Message: [QUOTE="ssomerville, post: 1122047, member: 56344"] Maybe kinked fuel line from petcock to the carb? Or dirt clogging the petcock from the inside of the tank? The fact that it doesn't over rev is maybe not enough fuel getting into the carb at high rpm? Also, known problem on the '93 was the gasket sealing the carb boot to the airbox. Maybe remove the four fasteners and add silicone RTV to ensure a good seal. But it sounds like not enough fuel or too much air only at a high rpm. When mine runs as you describe it's PowerPort cleaning time, but said you checked that already. Good luck! [/QUOTE]