[2015 Z Force 800 53/Trail EPS]

Are they the yellow ones or the black ones?

Black ones.  They look exactly like the ones that Cfmotousaparts offers (see my link in previous response).

Good..those are the updated bushings.

Well, this is the first and last time I expect to replace the rear bushings, so I hope they are decent.  My stock ones are black, too, but unsure if they are of the same design.  I'll try and get this tackled later this week.

[2015 Z Force 800 53/Trail EPS]

Well, this is the first and last time I expect to replace the rear bushings, so I hope they are decent.  My stock ones are black, too, but unsure if they are of the same design.  I'll try and get this tackled later this week.

The first ones...like mine were were the soft plastic/nylon yellow. Lasted all of 500 miles or less. Then they made the black delrin bushings which lasted much longer.

Just a word of advice.  If you are not getting any play or having any issues with the inner bushings (the long ones) on the upper rear a-arms - leave them be!  They are a batch to get in and out of the a-arms.

The ones that I found with the most play were the ones mounted in the knuckle, and those are by far the easiest to replace.