Do some racing among friends on the neighborhood dirt track

Works on Chain Sprockets & Belt Drive Pulleys

and the second hole is for the mounting post or bolt of the headlight

#3476-10 Gas Tank Mount Kit Zinc Plated 1979-81 Harley-Davidson XLCH Sportster

Bolt-On Oil Tank for Rigid Harley-Davidson Big Twin Frames with Electric Start Brand_Marion Metalworks Do some racing among friendsTrue bolt on installation, installs in minutes with hand tools Accommodates 1965 1985 style 4 speed electric start primaries. Holds a 12 cell Antigravity Battery Incorporated clutch cable stop in lower oil tank mount Approximate 3 quart capacity Made in Cleveland, Ohio, USA This oil tank is designed to bolt onto 1936 1957 Harley Davidson style rigid frames and 1958 and later swingarm frames that have been hardtailed utilizing Harley OEM style cast