Mine was filled by the guys at minitrailbikes.com, and they checked, rechecked and test rode my bike before releasing it to me. I think the dealer makes a big difference in the product. I bought my last moped, a Puch Korado from steve's moped, and while the bike was good, I was somewhat peeved by their treatment of customers. I bought this bike at mini trail bikes, and it is doing well. If the tranny was low upon shipping, they surely filled it up. I also drained and refilled my tranny after breakin with ATF fluid, and she is running great. My Avanti was stolen, crashed at least twice and recovered within the first month of me owning it, and it is still holding up after I replaced the locks, gas cap and head tube bearings, and unbent the pedals and touched up the paint. My only complaint is the slow acceleration and poor hillclimbing when going up steep mountains, which I have in my area. A few engine mods should fix that tho.