I got another throttle tube and ground it down (see attached) they started out roughly the same. Now I have a full1/4 turn throttle exacty like my ZX10. Haven't tried it yet, but I know good and well that it will make a huge difference. With the added benefit of more leverage which makes it easier to turn and hold. I also put larger diameter (softer) grips on which adds to the leverage and the amount of control. The second picture show the original amout of turn, the third show the modified amount of turn, a full quarter turn. Don't worry the marks are soap pencil.