Not to bring this back from the dead...
..but maybe of use to someone else looking for 700SC info.
There are three drain plugs..one on the pan (main plug..the pan being a separate part from the engine case), one on each frame rail. The oil cooler is plumbed via the frame tubes, that's why there are plugs there.
The filter is a spin type..something like a 6010A (a Fram number). You can use a 'regular' filter band wrench of the correct diameter although you may have to trim the band width somewhat.
Be careful with oil refill. The stated spec in the service manual is a bit much. You can NOT tell what the oil level is after running the bike on its stand. It's never worked for me anyway. I start with a couple hundred cc less than spec, ride the bike through a turn or two, then check the level.
When refilling the hypoid gear cavity, there are two molded lines visible from the fill plug..oil level is to be between the two lines.
Any multiple carb bike will likely benefit from a carb sync. Certainly that applies to the four Keihins on the 700SC.