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IH: Oiling & Lubrication - Sub-04K
Pics of Stock 1982-1985 Sportster Oil Tanks
Click on a pic to enlarge:
The 1982 oil tank is the last year tank with a drain plug. Future year tanks had a drain hose plugged off elsewhere.
It had a different, 2-piece chain guard so you could remove the front part to get at the drain plug. 1)