i recently purchased a 1999 KX125 because it is much lighter and less tiring than my 1994 RM250. i noticed the KX125 is not much slower than my RM250 and the KX125 is much better on whoops. i want to make my KX125 as fast as i can so what are some good mods to buy? i am thinking of getting a boyesen water pump cover and a renthal rear sprocket. what size sprocket do you recommend or do you recommend a front sprocket? has anyone tried the boysen waterpump cover? what are some other mods that are good for a kx125 any sugestions are helpful.