Here is what you need to do and it will cost less than 15.00
1.Remove airbox and filter from carb and frame completely
2.Find out how big your carb is and then put a UNI filter staright onto your carb and then rejet by either raising or lowering your needle in the throttle body of the carb. this will give you a good amount more of low-end and a little more mid to top-end. I did this to mu old LT230 and felt a dramatic increase.