Harley Gas Oil Cap Gaskets Leather Cork ’37-’52 WL WLA OEM# 3509-36 & 3509-36A

  • Product Code: 294709737563
  • Availability: In Stock
  • $14.95

You are purchasing a pair of European-made leather & cork gas & oil cap gaskets or washers for 1937-??? 45" twin solo and Servicar models with OEM or stock type reproduction tanks.  These fit “bayonet” style stock and reproduction gas caps.  My books show the leather cap went on the gas side and cork on the oil side though the manufacturer claims the opposite.  Please do your research.  It's believed they may have changed to rubber gaskets on both sides in 1948, so do your research.  It does appear that big twin models used leather for their gas cap washers early on.

I also have leather sets for big twins 1936-1947 gaskets for vented caps, 1948 to 1964 vented rubber gasket set and 1965-1982 vented/non-vented cap gasket pairs on another listing.  H-D introduced a rubber gas cap gasket in 1948 and we do sell those on another listing.  These are perfect for the purists amongst us and for those of you who don't trust the seal of rubber with today's fuels.  We also have a couple of listings with Eaton caps and these gaskets.

We sell reproduction Eaton caps in the short knurl 1936-1940 style, 1941-1953, 1954-1964, etc.  We also sell them in OD green, nickel for 1936-1941 models, brass, black enamel, and parkerized.  We also sell fuel rods, cad plated fuel lines, tank divider strips, and tank emblems and hardware.

Cork gaskets might not be right for you if your tank bungs or cap bayonettes are getting worn, you might want to select our leather gaskets or later 1970's style which will help give you a better seal if you have wear issues with your originals.

Used on Knucklehead, UL, 45" solo, and possibly the 125S or Hummer model.

We do offer reproduction Eaton gas caps in 1936 to 1938, 1939 to 1954, 1955-1964, 1965-1972 caps as well as 1973 and up in our store under separate listings.  Located at and ships from Cimarron Cycle Works in beautiful Cimarron, New Mexico, USA! 

I have test fit and confirmed the fit on 1936-1938 and 1939-1954 style Eaton caps which fit the following models:
  • 1937-1952 W, WL, WLD, WLA, WLC, WR, WLDR, WRTT
  • 1937-1973 G, GD, GE, Servicar (believed to fit all the way to 1973 though rubber was introduced in 1948)
Please check my eBay store for CP-1035 and CP-1038 hardware, parkerized clamps & clips, speedometer drives, decals, tank emblems, and other odds and ends for your vintage Harley project.


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