Oh No!Hate it when that .... happens

[barossi73]

Gave bike a thorough clean,set about doing its 1st top end 68hrs 13 200,tank and shrouds off etc and so on.remove pv covers and gingerly disconnect p.v rod and remove actuator plate(fiddly little ...!)lift head off,looks good to me,lift barrel off,some marking but nothin you can feel where piston runs.going along nicely i get the clips and wrist pin out with minimal fuss.piston off,looks pretty good.compare with the wossner thats goin in,same profile etc(slightly different relief shape above wrist pin?).all good.clean parts.dont want to leave it open so fit new rings with a little oil.remove old needle bearing then oh no!,the supplied bearing is 3mm narrower.Hate it when that .... happens!I briefly wonder if it would matter?And what the consequences might be?Aargh!Wont be finishing this tonight...had just enough cling wrap in the drawer to wrap barrel,head and cover case!
on the plus side things look pretty healthy in there and when im at the shop getting correct part tomorrow,i can get a 2nd opinion from mechanic while givin the parts guy a windup