So, I've got a nice fzr400 roller with some nice goodies on it, a couple good 400 bottom ends and cylinders but no head or pistons. I have access to some YZF600 top end stuff including rods and pistons. Question is, what should I build? Years ago I investigated the 560 option but never followed through and it seemed a bit more complicated then what I wanted to do at the time. I've read some about the 490(?) option but I'm not sure what's really involved with that. Not really looking to build up a stock engine or plug a 600 in the frame, though that would probably be easiest. Any advice or ideas? Tips or tricks? Thanks!
