Tis underneath the transmission on the left front of the square oil tank.
The drain plug for a 1999 Harley Davidson soft tail is located at the bottom of the oil tank. There is a rubber hose leading to the frame, follow it to the right side of the frame. It is located under the bike on the frame.
.040"
The suggested spark plug gap for a 1973 Harley Davidson is 0.040. It is the suggested gap for most of the spark plugs of that era.
the gap for a Harley plug on a 88c.i. is 30
The spark plug gap for a 1999 H-D (Harley Davidson) is .032 to .036. The actual gap depends on the brand of spark plugs.
The proper air gap is .032 to .036 depending on spark plug brand.
On a 1993 Harley Davidson Low Rider custom, the transmission drain plug is underneath the transmission. The filler plug is on the side of the transmission case.
The recommended spark plug gap for a 1996 Harley Davidson 883 Sportster is .040. That is the most common gap for most Harley Davidson engines.
40
The 2003 Harley-Davidson Heritage Softtail transmission drain plug is on the bottom of the transmission. The drain plug is flush with the bottom of the transmission. You can remove it with a half inch ratchet.
Under the motor
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