Over the summer my 900 started leaking oil, right from the belly pan onto the floor. Not a ton of oil but enough to soak the cardboard and then some. I brought it into the shop and they told me it was a normal thing with thses sleds and that there is a blow off valve that every once in awhile blows off the excess oil. It is not from the reservoir as the oil is slightly used and does not have the sweet smell. it's just a little dark and seems to be dripping from the clutch side belly pan. Is this something I should worry about or have you guys heard about this?