Assuming you just want to get bike running well, buy GY6 clutch and put on yellow or red springs. Slap it on, good to go. Easy Peasy.
You won't find any stiffer springs to go on that stock setup. You'll have to spend time lightening shoes or whatever depending on what you're doing. I didn't see your setup.
The GY6 is the easy way to go if you have a basically stock bike or even one with a kit and pipes. I have them on all three of my bikes