will '10 YZ450F springs work with 09 bike?

Hey there, ive got a buddy who bought an 09 yz450f but its way undersprung for him. i want to return the bike to original spring rates and found a guy selling complete stock springs (front and rear) for a 2010 YZ450f im not sure if these will work in the 09. OEM part numbers are different but spring websites spec the same springs for both years. i was wondering if anyone can confirm whether i can use the 2010 springs in an 09?


thanks for any info



They won't fit.  The length was changed in '10.

They won't fit.  The length was changed in '10.

Thanks gray, appreciate it.

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