Wiseco Piston Question?

[Ravenite]

I'm currently assembling a Predator 212 and am installing a Wiseco flat top piston. The problem is that it came with 5 rings and the piston only has 2 grooves. I have the scrunch ring and the 2 oil rings on either side of it seated into place on the bottom groove of the piston. This leaves me with 2 rings and only one groove at the top of the piston. What ring do I use? One is copper colored and the other is black. Both stamped with "N".

 

[ole4]

you want the top compression ring on the top ring position, the center ring is not used. Didn't it come with a sheet to identify the rings?

 

[Ravenite]

you want the top compression ring on the top ring position, the center ring is not used. Didn't it come with a sheet to identify the rings?

It did not. I'm guessing its the copper finish ring?

 

[ole4]

I think copper is top and n faces top of piston. top ring should be barrel faced and second ring (when used) is a scraper.