It is not a hard job at all. The hardest thing I ran into was taking off all the fenders around it. You shouldn't even need to empty the oil if you keep the tubes in the up position. A clymer manual really helps. Good with it!

 

Do ya know much about adding power to a Big Bear 400 man? and snorkel, which shouldnt be too hard for me to do just dont know if I have to re jet the carb after putting a snorkel on?