I have a 14' yz450f with 78hrs on it i rode it friday night and parked it in my garage. Next day noticed there was oil on the ground and uppon further inspection it looks like my sproket shaft seal is leaking... Im wondering if i have to split the cases to fix this or if i can just pull the sproket and get to the seal. Had me curious so i looked around for anyting else and it looks like coolant is coming out of the water pump weep hole!! WTF. Any advice with these repairs will be helpful like which parts to order ect. Thanks!