Kona Major Jake came FSA Gossimer cranks and an FSA Mega Exo bb. The bearing cups were marked BB6000. New bb needed and lbs sell me a Mega Exo but marked with BB8060 which i was advised was just a better version of the 6000
New bb has an additional inner metal sleeve that slides over the crank axle in addition to the sealed outertube . All fitted but the cranks seem draggey as if the inner sleeve is placing too much preload on the bearing inner races.
Can i ditch the inner sleeve, the bb6000 didn't have one or have i just been flogged the wrong bb.