Posted August 3, 200915 yr Hello, I just bought 1984 yamaha XJ 750R, the motorcycle specialist cleaned the carburator, now it is runing perfectly for rpm 1000, but after i ride it for over an hour and it warms up, the rpm goes up to 3000 and stay between 2500 and 3000, if i shut it off for an hour and start it again, it will goes back to 1000 rpm. anyone would know what the problem could be? thanks JAY
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