There is not one. Harley Filters are made better than Fram Filters. You might consider Purolater motorcycle filters or a motorcycle filter made by Champion. Do not use an automobile filter on a motorcycle. They are made for oil pumps that have higher pressures. Try the Fram PH6065B
1.8 qt no filter-------2.1 with filter
The air filter is under the gas tank
it is probably at the back of the car
underneath the motor...
wrong oil filter , bad oil filter gasket
hd motorcycle
no! use only motorcycle oil. automotive oil will not protect the clutch on a motorcycle and synthetic oils for cars are not designed to protect the clutch either.
Ther should be an access panel in the top of gas tank that is where the air filter is located .
The oil filter is located behind a circular cover in the lower front center of the engine. This picture may help: http://www.bikebandit.com/suzuki-motorcycle-gs500ek-1989-oil-filter-oil-pump/o/m6049sch236925
Probably because the air filter is blocked. Take it for a service !
Sounds like you make have blown a gasket.