vin#

Hey guys, I'm looking at buying a mid. 60's Yamaha. From what i have about the bike so far is that it's probably 65-67 YL-1 or YL-1E. It belongs to my buddies brother, but they don't know exactly what it is. It's in a barn in Sask., Canada. Here are the VIN#'s, Frame: Y33 506634 Engine...