I "unlike some people" , actually read the manual and followed its instruction regarding break in for the first 300 miles... I avoided full throttle starts and tried to avoid one constant rpm for very long....and didnt redline it.......thats about it...took me about a week to hit 300 miles...
My very first ride out after that 300 mile mark..I "floored" it thru every gear and redlined it every chance i got...the more miles i put on..the more power i felt coming out of the engine
It may already be too late you for..you might already be stuck with an underpowered unresponsive bike because you babied it already TOO much for WAY TOO long...so for gods sake man..get out there and try to save your bikes engine now!!!
Disclamer: (This is only a suggestion, you as a human being can follow or not follow anyone's advice of your own free will, I am not responsible for repairs or any serious bodily injury or death that may occur from you following my advice)