Is the engine, more specifically the pistons, in the 1987 fzr 400 different in any way to the 1987 fz400r? If not will the piston ring set for a fzr 400 work on the fz? The PART NUMBER - 1WG-11610-00-00. Thank you in advance

i've got a couple of sets of 3en1 pistons taken from engines that had damaged cases, not problems with the bores etc. I can measure them up if you know what you need, may be willing to part with a set!

The 87 FZR400R is the SP - I read somewhere the pistons are different from the Genesis with longer rods, I don't know how accurate that info is though.
The 88 + 89 are the 3EN models,

If you're doing this up for you to ride then I'd be looking for another engine the money for rings will buy you that. Even if it's a show bike the engine number is still 1WG so nobody will mark you down on it.

Well its just the rings only i need the oil rings and the compression rings so hence my question for compatibility its just to ride really?

I'm getting a set of 4 rings for a great deal but its from the fzr 400 and I will need 4sets of rings.

If the rings are the same,Then the part numbers should be the same,
Can't you check out the part numbers.