Here's an interesting situation. I have a 2006 Sportster XL1200R. Bought the bike with 450 miles on it, now it has slightly over 1,000 miles. I wanted to change the transmission fluid to Mobil Synthetic. The service manual and the owners manual both state that the transmission takes 32 ounces. After reading other posts, I didn't want to hassle with removing the footpeg and the clutch inspection cover, hoping to drain out 32 ounces and replacing it with 32 ounces of new fluid. I was very careful, marking the Mobil jug at the original fluid level, which appears to be 1 quart, or 32 ounces as advertised. After draining the old fluid and replacing it, I put the used oil into the Mobil jug to the original level, and using a measuring cup, discovered that I actually drained at least 39 ounces. I believe this was the original factory fluid because the prior owner was well known to my dealer, and was not a "hands-on" kind of guy. Are the manuals wrong? Did the factory overfill it?