Clutching

Hello all. I've got 2003 Edge X 800 I'd like to get some help with the clutching. My max rpm right now is 7900 rpms. I'd like to raise my engagement up to 5000 rpms without losing my max rpm of 7900. I was thinking of getting them belly buster clutch weights and a spring. I need to know what weight springs I need to have my engagement at 5000 rpms....I have the Polaris OEM Team Industries Secondary, which i will leave on....I would just like to have my engagement up to 5000 cause I will be in 1/4 mile drag races coming in April.....any help would be greatly appreciated....