I'm giving you a link to proper break in methods,
http://spookytoothcycles.com/help-and-info/frequently-asked-questions/30-faq12.html but first let me tell you what I did. First, tried mixing the oil and gas in the tank - big mistake. I poured the oil in first, then the gas, and that caused engine failure because the oil clogged the carb and I had to take the carb apart and clean it.
Next mistake: I tried running it like it was already broken in. I ran it uphil the first time I used it at WOT. Big no-no. As you can see from the attached link, you have to let the piston rings and bearings seat properly, and you should not "flog it hard" up any hills. You shouldn't even be going up any hills during break-in, period!
I ran it like Wayne here, for periods of up to an hour and even more. At first, it ran well, but then the problems began. I noticed I was getting poor acceleration after traffic stops. Some people told me it was the CNS carb's fault, especially when I mentioned the performance would improve AFTER I shut off the fuel line..but only for a few seconds. Then a mechanic told me I had poor compression, and a gasket had been blown. I had to replace the head and cylinder gaskets, the cylinder, the piston and the rings. Oil was leaking out from the gaskets.
Three one hour sessions at break-in is crazy. Always running at full throttle does not leave enough time for the oil mixed in the gas to circulate around the engine and lubricate the cylinder wall and lower engine bearings.
Also, with the engine running, always pedal away from a stop before releasing the clutch to assist the motor. How many people disregard that and then end up having problems later?