I have a Ninja bro. Your fluid should be somewhat clear with a yellow tint to it. Dot 3 and Dot 5 are both NOT to be used in my bike, but I have Kawasaki, not a Suzuki. I have to use Dot 4 only!! If your fluid is not "somewhat" C-Through and it's a orangish-blackish color, its contaminated from brake dust. It will still work, but I would Change it out just to be sure.