Hi.. excited to get the 05 WR450F fired up after its new top end rebuild! Once fired up i have a leak from UNDER the water pump area on the right hand side on the right hand case..Its between 2 bolts and it looks like a small hole about 3mm in diameter.Looks like its supposed to be there cos i checked on another WR and its there also...Never leaked coolant before top end rebuild.. Whats this HOLE FOR?? breather, Why is there coolant coming out from here?? Has a seal or something blown???