You are right. The swing arm is the part the tire bolts on to. It "swings" up and down to absorb the bumps in the road.
The subframe is the metal struture that supports the riders seat and passengers seat. It bolts to the frame on the R6. Some bikes have the subframe welded to the frame. Since the R6's is bolted on, if you wreck, the sub frame can be replaced. But the bikes whos are welded on are just S.O.L.
And there is no stupid questions, only stupid people....Just kidding. I am sure there are others with the same question, but too skeered to ask.
is the frame / subframe issue you mention the same on the '03's? I was under the impression that the '03 had the subframe welded to the to the frame, but not positive. Don't have the will to look it up right now........
The subframe does not move up and down to absorb bumps, the swingarm moves up and down.
The subframe is what you would see if you took off your tail section of plastic.
It is bolted on or in some cases welded.
It's purpose isthe same as the main part of the frame. It gives the bike shape and rigidity. It is what the seats and rear sections of plastic connect to (along with some electrical crap and the battery)