Mine fires right up, unless it has been sitting for two weeks or more. But start up after cams and tune and willingness to rev never an issue here. I would assume that you know not to rev these bikes hard until completely warm, and give it a bit of throttle on start up. Mine idles at 1000 rpm when at temperature. And, what's your tune? I went with Maximus. Full tune of A/F ratios all the way up and increased limit to 6300. Timing also set from idle up. She runs reeeeaaal good.