[Cross849]

Will an 06 bottom end work in an 02 bike with 02 top end? Does anyone know?

[JimDirt]

Are you asking if the cases will interchange , or the crank ??

The cases are different 02-04 where the engine mounts go (i believe its just the front mount that is different , but not 100% positive), but i "think" if you swap the later model motor mounts and spacers and bolts to the frame , i "think" it will swap , but i have not tried it myself

The cranks should be the same , as should be the cylinder/head as far as bolt on goes from 02-08

PM Ken , and he can tell you for sure what will swap or what is needed to make the swap

[Cross849]

How do I get in touch with ken?

[JimDirt]

Click on this link (below) , then click on the PM , where it says Private Message and then you can send him a message , he is the owner of this site and sells OEM parts , so he would know what parts interchange and what will not
http://www.crfsonly.com/forum/profile.p ... rofile&u=3