picked up quadrunner that is missing the cylinder and head, ive searched and come up with two options under parts listings, one part number has a (x,y) after it and other has(k1, k2).. how do i figured out what model i have? also does anyone know of used atv parts places? thanks

 

I looked at the fiche, I see what you mean.
I'd guess that the VIN may hold that info.
Maybe ask for the service manager at a dealership.
Wish I clould help more.