Question about 1979 Harley Davidson XLH 1000 Sportster

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If the brushes on my 79 sporty get oil on them will cause it not to charge

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I can't say that I have ever run into this problem before. The brushes are on the outer end of the generator from any oil and not readily available for oil to get on them. The bike would have to have a terrible rocker box leak and the protective band would have to be off. But, I guess it's possible for oil to prevent a generator from charging. It's simple enough to pull the end off the generator and clean up the commutator ring and the brushes. Make sure you polarize the generator when you put it all back together by momentarily shorting the armature terminal of the generator to the positive post of the battery.

Good Luck

Posted on May 25, 2011


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2006 sporster 1200 lots of valve noise has oil pressure.think it is colasped lifters. what your thoughts.or trouble shooting tips without breaking down the engine

If you're having that much valve noise, you have probably lost oil pressure for some reason. Take your oil filter off the engine and take the spark plugs out. Spin the engine with the starter and watch for oil to pump out of the fitting for the oil filter.

Now, you didn't mention how loud the valve noise was. If you have indeed lost oil pressure to your tappets, the noise will be quite noticable, not just a slight rattling. Your bike will sound like a pea thrasher.

The late model Sportster oil pumps are not like the older models that were so bad about shearing the drive pins. The late model doesn't have the pins. They have flat drive angles on the oil pump shaft. About the only thing that I can think of that would cause a loss of oil pressure on a Sporty is a piece of trash got into the tank and is blocking the inlet to the pump or the pump is air locked for some reason. Unscrew the oil pressure sending unit and spin the engine over long enough to pump out a few ounces of oil.

I've only seen one Evo Sporty lose oil pressure. Someone had tried to stop an oil leak in the oil tank by Creme coating the tank. Creme is designed for a fuel tank, not an oil tank. The coating cannot take the heat of the hot oil, becomes brittle and starts flaking off.

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I have a 2006 883 sporty( wifes) and this past summer it began it pass oil out the breather, not alot but enough to make a mess after a long ride and it puddleson engine when bike is on stand.Oil is not...

Most of the time the oil problem is caused by the little breater "umbrellas" in center rocker box section. Over time of heating and cooling, the little "umbrella" become brittle and fail to seal properly. Crankcase pressure then blows the oil out of the top of the heads and into the breater.

Most people purchase and install an aftermarket breather kit that reroutes the crankcase pressure. This is fine but it does not stop the oil problem, it just keeps it out of the breather and moves it somewhere that it is not as noticable. The proper fix it to remove the rocker boxes and replace the little umbrella seals.

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