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CBR600RR:
I've been searching for 2 days and find mixed responses. Can I put an 04 motor on my 05 frame? Will my 05 akrapovic headers fit on the 04 ports? I hate to get into it and find out it's a no go. RonAyers.com has a listing for an 03/04 frame and an 05/06 frame ... but the crankcase part number is the same. Not sure if I need to use the 04 ECU w/ the 04 motor. Thanks in advance!!
 

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First of all: I don't know! But I'm going to guess the odds aren't good.

I think the odd's are good that you could go back and forth between a 03 and a 04. There wasn't much of a change between 03 and 04. Similarly I'd bet you could go back and forth between a 05 and a 06. There wasn't much of a change between 05 and 06.

But there was a more significant re-design between 04 and 05 so less of a chance that it would work.

So if nothing else I gave your question a bump! eh? :)

PS: Have you found a definitive answer yet?
 
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