Twin Power 70-E79 FL FX 71-79 XL Advance Unit Screw Replaces H-D 3570

Twin Power™ advance unit screw precisely replaces H-D 3570, securing the timer assembly for accurate ignition timing on 1970-early 1979 FL/FX Big Twins and 1971-1979 XL Sportsters.

This Part Fits:

Year	Make	Model	Submodel
1971-1979	Harley-Davidson	FLH Electra Glide	Base
1971-1978	Harley-Davidson	FX Super Glide	Base
1974-1979	Harley-Davidson	FXE Super Glide	Base
1979	Harley-Davidson	FXEF Fat Bob	Base
1977-1979	Harley-Davidson	FXS Low Rider	Base
1971-1979	Harley-Davidson	XLCH	Base
1977-1978	Harley-Davidson	XLCR Cafe Racer	Base
1978-1979	Harley-Davidson	XLS Roadster	Base
1977-1978	Harley-Davidson	XLT	Base