Can't answer that, I've never been off the pace. I'm sure it's going to happen one of these days, so I'm reading all the posts so I can know how to handle it, but up til now, it's not something I'd have to deal with.
Couldn't resist. ^^^^
I got lapped in the most recent enduro at the 4-letter. In my second race, I raced like Brindle did the first time I saw him on the track. I was down a minute after 6 laps in a race where lap times were roughly 1:40 and I had 54 laps to go.
Late in the race, I saw the leader in my mirror a few seconds behind (or actually, a lot of seconds ahead). I really, really, really didn't want to get lapped, just for the sake of pride. He got closer and closer (it was the chubby guy from Indiana who went to Silverstone) and the closer he got, the faster I went. I put up my fastest laps with him behind me.
Eventually, he caught up and when he did, I lifted before a turn so he could have the line and not interrupt his rhythm. I flipped him the bird as he passed and I'm sure he returned the favor.
I don't think guys need to roll over when being overtaken, but at the same time, I've seen bozos dive bomb into turns to keep their spot and stay on the lead lap. If I'm getting my ass handed to me, I've got no problem getting out of the way.