What wrist pin bearing do i need??

[FreeFall7]

Hi guys. I'm putting together a 61x top end.
I'm using a wiseco top end kit . My question is do I need to use shims on each side of the wrist pin bearing? My bearings are wiseco "B1031" 20x25x22.8
They seem to have excessive side to side play when installed on the rod.

I purchased the top end from Millennium Technologies and the guy I talked to there sed i didn't need shims with the bearings but it just doesn't seem right...

 

[FreeFall7]

Looking on Wiseco's site.
The 650 uses "B1023" 20 x 25 x 24.8
2mm longer than the ones they sent me...

So much for finishing the build tonight..

 

[FreeFall7]

So i guess the question now is do i get 650 bearings. Or thrust washers?

 

[BruceSki]

Either way is fine.