olympus
I,ve just bought a FAG 6007 2RS bearing for a duplex setup £7.50 at Marksman Bearings up the road from me, the one in the triplex primary on my bike coming up to 20,000 miles and still with very little free play.
Primary oil is changed every year and always dirty looking but doesn,t smell like engine oil leakage, maybe contaminated with moisture, clutch wear debris and a sealed bearing is a great upgrade.