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8,355 Posts
My 1st suspicion is a Carb boot leak combined with faulty float heights and or sticky Float needle valve.Covered here,
http://globalcxglvtwins.hostingdelivered.com/viewtopic.php?f=19&t=110
http://globalcxglvtwins.hostingdelivered.com/viewtopic.php?f=19&t=110