1980 Z1R D3 Wheel Size

Here’s an interesting bit of production history… potentially.  So it seems on the 80 z1r, the rear wheel (same as 78) has a raised Kawasaki logo in the style of the z1/kz900 tank badges. However, the front z1r d3 wheels have it in block letters like the 80 logos. 

I assume that is because the rear wheels were leftover and they just ran out their stock while the front wheels were a newer style that would appear on models past 80.