I have a 2000 warrior and i have exhaust already on it and a different back sproket. I want more speed but still want low end power. what are some easy ways,and what type of engine work could i look into and how fast after each thing would it make it.

 

An inexpensive investment would be a new countershaft sprocket...stock is 13T, you should try a 14 or maybe even 15 tooth sprocket. You should be able to get away with the 15 tooth since you have the pipe. I would also suggest getting a Pro Design Air Filter Adapter, then you can run without the airbox lid. What kind of pipe is on it, did it come with the header or just the silencer?

 

I have a FMF megagamax II pipe, just the silencer. no header