the cbr F4 has 7 plate clutch Can i install the 8 plate clutch from a F4I? would this even help me at all, or would it be a waste of time to do this? and i was wondering too if i can put the F4i cylinder head on my F4 because the F4i one has 2 valve springs and the F4 has only 1 so the F4i head would be much better high-rpm valve operation and durability. or could i just change the springs and would work the same? thanks in advance for the help