CBR600rr gets quite a lot of improvement after f4i.Firstly is
the swing arm,they get the idea from RC211V
they known as pro-link.It was make from new cast aluminium much
more tougher and lighter then f4i.Second is the engine,the rr model
engine get more compact so it can rev to limit 15000rpm redline.And
there a lot change in the engine.Third is the dual sequential fuel
injection.(which is yzfr7 is using)Over all the cbr600rr handling
is veri good.U can play that bike without damper.The chassis is
well buit.Over all the bike is good.