Primary Lube
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Primary Lube
PRIMARY LUBE
Most bikes that run and enclosed oil bath primary chain have little problems with the chains. Early Harleys that use the chain oiler and the constant loss primary oiling system will go through primary chains a lot quicker than later models that used an oil bath. Some later Harley's ran the primary oil back through the engine, expecting the oil filter to filter out all the fine pieces of worn out clutch and primary chain material. This really wasn't a good idea, and a lot of these bikes have had this system changed over so that the primary chain housing must be manually filled and the engine oil is no longer routed through the primary. This usually works well , but if your bike has been modified this way be careful of primary cover leaks. If the primary cover leaks with the stock system, as long as there is oil in the oil tank, the primary chain will stay lubed. With the modified system a leaking primary cover means that if the oil level in the primary cover is not occasionally checked, the chain can eventually run dry.
Most bikes that run and enclosed oil bath primary chain have little problems with the chains. Early Harleys that use the chain oiler and the constant loss primary oiling system will go through primary chains a lot quicker than later models that used an oil bath. Some later Harley's ran the primary oil back through the engine, expecting the oil filter to filter out all the fine pieces of worn out clutch and primary chain material. This really wasn't a good idea, and a lot of these bikes have had this system changed over so that the primary chain housing must be manually filled and the engine oil is no longer routed through the primary. This usually works well , but if your bike has been modified this way be careful of primary cover leaks. If the primary cover leaks with the stock system, as long as there is oil in the oil tank, the primary chain will stay lubed. With the modified system a leaking primary cover means that if the oil level in the primary cover is not occasionally checked, the chain can eventually run dry.
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