Question about Harley Davidson FXST Softail Standard Motorcycles
Well, I don't know about a Big Dog but I do know how the dipstick on a Harley is set up. You have two marks on the stick. The top mark is "FULL HOT" and the lower mark is "FULL COLD". Since the S&S engine is just like a Harley engine in that it is a dry sump type engine. When you check the oil when the engine is cold, as long as the oil is touching the dipstick, you should be OK to ride. Once the engine comes up to temp, then check the oil and bring it close to the top mark. Do not overfill. Never add oil to a cold engine unless you cannot see oil on the stick.
Now, for the leak on the left side of your bike. Now you said that your Big Dog is a custom chopper and your replaced the main seal. You did not tell me whether your primary drive is a standard chain drive primary or an open belt drive as so many "custom choppers" run. If you replaced the main seal, did you lubricate the inside lip of the seal before you installed it. If not, when the engine starts up, the friction will burn up the lip of the seal before the oil gets to it. It only takes a half second to burn the lip of the seal. Always put oil or light grease on the seal lips when you install a seal.
If your primary drive is a standard chain type, the leak could be a bad engine to primary O-ring that goes between the engine and the inner primary cover.
Another place that the oil could be coming from is the nosecone. If the oil is leaking out of the bottom of the nosecone, it can leak down to the centerline of the cases. When you put your bike on the kickstand, the oil will then run across to the left side and drip off. The best way to find the leak is to clean everything off as clean as you can get it. Then go for a short ride and come back and look for the leak.
I hope this helps.
Posted on Apr 10, 2011
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Posted on Jan 02, 2017
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