Double check what factoryx said, if it is in fact just 2t oil than your in good shape. If it is the seals, than you need to take the right side (Sitting on the bike) crank cover off, and take off the gear that runs off the crank. You will see the seal around the crank shaft and should be able to pop it out. To put the new one in, take a socket that fits the seal well and pop it in. Sometimes these things just slip out of place and can be placed back in, but you wont know until you get the cover off.