I am rebuilding my 2004 YZ450F.
I bought whole thing I needed, but the Cylinder and Piston kit was for YZ450F.
So Cylinder seated OK, but Piston pin was bigger than the YZ450F. Couldn't go there in piston rod.
I am going to buy a new piston. So any warning for me???
What years and which models' piston and piston pin will fit???
Of course the crank shaft and connecting rod is stock 2004 YZ45F.