I have a 05 raptor 660 and its basically stock but after many dune trips this past year i noticed my last trip that oil was coming out around the shifter seal and i replaced it but the leak still was occuring and i have learned that it maybe my main shaft seal behind the front sprocket does anyone know if this seal is a pressed in seal or not and is it hard to replace if i can do it myself THANKS for any help that i get