Not sure about the chassis difference..for the duc 749 and 99 you are absolutely right-they have same chassis/bodywork but different engines..as far for the jap 600 not really sure.But if there is a difference it will be very very very small..look at some pics of "naked" cbr 600 VS "naked" cbr 1000 and you´ll see what I mean.Cheerz!
We invite you to introduce yourself by a few sentences if you are new to
this discussion group. Enter your e-mail to join the forum and get notifcations on new messages. Or post your question,
answer or comment as a guest. We have just improved this discussion forum and expect the number of users to increase.