i have a 02 raptor 660 and it has the stock front and back sprocket on it. Heres my question i wanna change the rear sprocket (which is a 40tooth i beleive) because i think 1st gear is way to low and 2nd is to high. I want want to get more use out of 2nd gear so im not always having to downshift if tight trails. So what size sprocket should i change to??? or would it be better to change the front please help me????