My most common answer. This procedure is covered in detail in the proper manual for your model
A 2003 sportster has a chain drive for the promary, firm the engine to the transmission, and a belt drive final drive. The final drive is from the transmission to the rear wheel.
Every 60000 miles you must to change it
FXB is the Sturgis model made from 1980 to 1982. The B stands for belt drive. Sturgis was the first model to be fitted with a belt drive that is now on all Harley Davidson models. In fact Sturgis models were a dual belt drive, primary and final drives are belt driven.
The first Harley belt drive was on the original motorcycle built in 1903. But it was a flat leather belt driving a pulley bolted to the rear wheel. The first modern toothed rubber drive belt was on the 1980 Harley's.
Some of the older one's dont
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All Harley-Davidson Road King models are belt driven.
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1903 the first harleys had a belt with a tensioner to make it go
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