Dimotiv Rear/Clutch Oil Reservoir Cap for DUCATI Diavel & BMW R1200GS ADV R1200 S1000RR K1300R (GOLD) This listing of clutch/ rear reservoir cap fits: Please see product description. It is made of 6061 aluminum alloy, strengthened by T6 heat treatment. High color anodized along with special coating. Available in other color options.