Rear shock absorbers.

[Riccardo]

Are they original?

[4pots1969]

Apparently Yes... That is what could make you think that they are not?

[Riccardo]

After 40 and more years is not easy find the absorbers in this condition, with untouched decals.
The aftermarket are very similar.
I have some doubts.

[hondasan]

look to me that these could be 750K1 units - note the extra chrome seat / washer under the spring, something introduced when the spring was changed. Nice items though.

Chris R.

[DW69K0]

I always compare the number of springs spirals visible between the bottom of shock and the top cover. My Sandcast springs have a tighter rotation with seven spirals visible and the next version with six spring spirals visible when viewed with no weight on the seat on a bike at rest. These look to be late K0 or K1 springs in really great shape.
DW

[Steve Swan]

My humble opinion:  not "sandcast."  sandcast had 7 exposed springs.  later units had 6 visible springs.  as someone pointed out, the early units springs had more windings.  i've always called them "7 spring" shocks.

I have a clean pair of correct 7 spring shocks i do not need; i will sell. 

[kmb69]

Steve, sending PM on your shocks. Keith

[Sgt.Pinback]

What is the overall lenght and the lengt "middle-middle" of KO springs?

Thanks!