I AM SWAPPING COMPLETE FRONT END FROM 82 GPZ750/R1 TO MY 78 KZ650C AND HAVE NOTICED THAT THE BEARINGS ARE DIFFERENT.THE STEM SIZES ARE DIFFERENT BUT THE LOWER O/D OF THE CUP ARE THE SAME.ANY HELP WOULD BE APPRECIATED ON HELPING ME ACHIEVE THIS TRANSITION.IS FOR MY RACE BIKE MY KZ650C.JUST LOOKING FOR A BETTER FRONT END OVER ALL INSTEAD OF JUST SWITCHING THE FORKS OVER.THANKS.

REGARDS PAUL :055