the gap for a Harley plug on a 88c.i. is 30
it the 5/8 hex bolt on left front of the sump pan. you will need 1 quart of Harley Transmission and primary oil.
I need the spark plug gap for a 1340 evolution engine on a 1997 Harley Davidson Heritage springer soft tail
I prefer Autolite plugs. Dyno shows them to add about 2 HP.
A 5/8" socket wrench.
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.
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 correct spark plug gap is 40 thousands on a stock harley plug