http://www.mototuneusa.com/break_in_secrets.htm
20k not one issue other then the ECU swap.. Countless trackdays and autoX.. Both my gixxers ran in the same way, 84k on my race bike with not a problem, stock other then exhaust and AF with a power commander, the 2011 gixxer 750 has 24k not a issue with either.. Also the 03 600 put 112 to the wheel after 54k so I didn't have a issue running three engines in with the motune method