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REF: Oiling & Lubrication
Sportster Oil Pump Comparisons
Comparing 77-85, 98-06 and 07 and up Pumps
With a 98 style gasket on the 79 pump, the gasket fits nice and snug as it should be. 1)
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A 1-1/2“ hole was cut into an aluminum plate with 4 holes tapped to mount the pump.
Both the 79 and 98 pumps were bolted to and outlined on the aluminum sheet. 2)
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The mounting surfaces are compared below.
The red circle indicates the projected oil entry hole in 77-90 engine cases.
The last pic is a projected lineal of 3/16” from the outside upper edge of the 98 style pump to the center of the entry hole in the case. 3)
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1)
photo by Hippysmack
2)
photos by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2071153&page=6
3)
photos by Hippysmack
