hello to all forum helpers. first of all i am asking because searching in the forum is not available wright now. I rod my bike today (WR426 2001) and notice a little drops come under the water pump (their is a hole under the water pump side cover which water came out from their), check the oil and it is OK (new oil), not milky. All the ride was for 20 minuets. what parts do i need to replace and what to be disassemble? do i need to drain the oil for getting the impeller out? thanks for all helpers.