I wouldnt call these piggyback shocks, they just have a reservoir attached. Almost every Honda dirt bike from the last 40 years has had a shock with a reservoir. The 450R atv had shocks like that as well front and rear, so did the 700xx.
I consider piggyback shocks to be remote reservoir shocks like the X3.
Closer look at this. It looked like the winch plate fits. Look closley the OEM bumper has ready tabs and holes for the winch mount. I think it will fit.
Yeah I dont see any reason why it wouldn't, maybe there is no place to mount a fairlead or their just not comfortable with the small bumper taking the weight.