I've search and have read a lot on the KX100 but I'm confused. I ride strictly woods and no MX. I want to be able to climb rocky and muddy hills better. I'm doing fine as is but on the steeper hills I'm finding that my rear wheel is spinning to much and I get don't get anywhere. My bike is a 2003 and it is all stock. What else should I do to make it more trail worthy? Do I get a smaller, 12 tooth, front sprocket or a larger tooth rear sprocket? From what I've read, some say leave the stock rear and just change out the front for a 12 tooth. Then I have read, leave the front as is and go up a few teeth in the rear? Which is it or is it do both? So, if I do change out whatever, do i also need a new chain? Thanks in advance.