Dirtbike shuts off when revved.?

I have a Yamaha 450f and after a year of sitting in the shed I changed out the jets, throttle tube and tire tubes. It starts perfectly and idles ok. But when revved maybe a quarter of the way it starts to lose rpm's and shuts off. And it makes a weird noise like a slight whistle or cricket type of noise. I thought it was the old gas in the tank so I put new premium gas and sea foam as well. I tried playing around with the carburetor but i can't get play nice. BUT... it does rev all the way when the choke is open (and I have to hold the damn thing open. It wont stay out >:/ ....) Any whom, can anybody tell me what is wrong or I'm doing wrong?