I found it difficult to keep up with smaller cc bikes but then I am not used to commuting in and out of London. So what's the best way of coping? .
They may not have the best bike, but they will lose a lot less if there is a crunch.
Best way is to let them pass.........I do it all the time. Trying to keep ahead of a smaller/nimbler bike with a rider than a) may have more experience b) no fear c) wants to show you what they can do d) errr late for something.........and ride like a dick in London traffic will one day be a painful & expensive experience.
Couple of my experiences......
I get away from t/l and then slow down, scooter man eventually comes past and keeps going in bike/ bus lane. Gets taken out by van turning left, I see guy fly in the air. He was dazed but ok
Doing 30 in 30 zone and see m/b lights in my wing mirror but quiet far back, 2 secs later he is next me. 2 coppers jump out in the road. We both stop, he tells me, "not you sonny, on your way"
Thought I keep ahead of some dick, nearly ending up getting squashed......don't normally ride like a twat and this was going to be the end result.
Certain places I would filter more but most of the time I take it easy and then give it some beans when the traffic opens up.
Not a commuter bike, but its the only bike I got (& want...apart from a HP4 of course)