Will a 2001 Yamaha yz 125 crank fit a 2007 Yamaha yz 125?

no because in the new one the space for the crank is smaller and the motorbike has many more options so they wont fill up the space to put a huge crank if you want to change your yz Yamaha take the 2006 one it is better

i prefer it to the others because the newer the more complicated trust me