crf450r cylinder head question

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May 22, 2007
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#1
hello, this is my first dirt bike. i bought it off of some kid that hydro-locked the motor. i have rebuilt the motor and am left with just the head. my bike is a 03, will a 04 cylider head or newer bolt on and run without any problems? will i have to change anything to make a newer head work? will my 03 cam and rocker assembly bolt on and run without problems on a 04 head? what are the differences, if any, between the heads that give them all different part numbers? what do you recommend?
thanks.