going to 9 tooth. what clutching do i need to change?

[sledhead6969]

I have a mountan viper that im putting a 1.25 track on it so im going to the 9 tooth drivers. I know i need to change gearing but what changes do i need to do to my clutches? i have the stock mountain viper setup. thanks. I want it be pretty close to what the setup i have now will give me (performance wise) maybe a little harder hit.