which berg?
I've got a '97 FE400E, first year with the counterbalancer and oil pump. I love the bike, and do everything with it, but in the really tight (NJ,PA,NY) woods enduro stuff, it nearly pulls my arms out of their sockets with all the torque. I can't imagine what another 100 or so cc's would do!!! If your going to be doing any tight racing stick to the smaller cc bikes. Reciprocating mass makes a big deal too, the bigger the crank the harder it's going to be to move the bike back and forth. My 400 is perfect, any more would be a handfull in the East.