Shifter drum and gears

Does anyone know if you can put the shifter drum, gears, and shifter forks from a 2010 CRF450R in a CRF 450R 2009? Bike will not shift out of 1st gear. I've read a others have had a similar problem and if 2010 parts will fit and if there is a problem why not try the 2010 parts to fix it.

Thanks, Kevin

9 to 12 is the same transmission.

and most of the 13 trans.

But I hear a 450x detent spring helps.

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