Question about 1979 Harley Davidson XLH 1000 Sportster

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How to do a transmission oil chage on a 1980 sportster

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There is a drain plug under the back end of the primary cover. Drain the oil and refill through the primary chain inspection hole. There is a "fill level plug" on the outer primary towards the front. Remove this plug and fill until oil runs out of the hole. Should take almost a whole quart when bike is standing straight up.

Good Luck

Posted on Sep 05, 2010

  • chris sweitzer Oct 24, 2012

    does that include the ****** itself...where the gears are,,,it seems to be closed up


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1980 xl treans level

Hi Anonymous, there is a small screw in the side front lower section of primary cover, remove screw and with bike standing upward pour in Sportster Chaincase Lubricant through the inspection cover hole untill it starts to run out of level screw hole. Good luck

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Jul 14, 2012 | 1979 Harley Davidson XLH 1000 Sportster

1 Answer

45@does the sportster use the same oil for engine & tranny

I think the later models are designed to use the same type of oil in both the engine and the prmary/transmission. But, I have never agreed with this. I use H-D Syn 3 20W50 oil in the engine but I prefer to run either Harley's primary and transmission lube or one of the other manufacturers lubricants in the transmission. If you use another manufacturer's lubricant, go to their website and check for compatibility for use in your Sportster.

Good Luck

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1 Answer

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Sounds like a broken oil control ring on the piston! needs to be serviced!

Jan 12, 2011 | 1979 Harley Davidson XLH 1000 Sportster

1 Answer

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On a Sportster, the transmission and primary oil are the same. There is a drain plug underneat the bottom of the primary at the rear. The primary oil is added through the upper primary chain tensioning access hole at the top of the primary. Add about one quart of Primary and Transmission lube for Sportster. I'd recommend H-D oil.

Good Luck

Nov 17, 2010 | 1993 Harley Davidson XLH Sportster 883

1 Answer

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On all Sportsters, the primary oil is also the transmission lubricant. Put approx. one quart of oil in the primary, H-D Syn 3 20W50 synthetic engine oil.

Good Luck

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1 Answer

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