1917
Harley Davidson had a rough patch in 1983.
Harley Davidson recommends it (Citco I think) but No!!! Just use the correct weight for your motor, time of year and how you ride it!
The very first Harley Davidson Sportster was produced in 1957.
It is a 1989 FXRS. Not sure of year, but it is an FXR Harley-Davidson.
I BELIEVE the first model year for the Ford F-150 Harley Davidson Edition was the ( 2000 )
1977
1991.
1966,1967,1968
1903
they didnt
1981