HARLEY Stainless Steel Tuneable Ignition Advance Unit Fits 1970-1978 FL, with points type ignition 1

Tuneable ignition advance unit features stainless base heat treated weights and three different color coded spring sets which allow full advance at 1400 2000 and 2600 RPM depending on which springs are selected. Unit can be used with all ignitions points single or dual fire types which utilize an advance unit. Springs are also available separately. Unit is assembled with stock advance srings. Includes gold severe duty springs 13-9247 for high compression heavily modified engines and silver spring set 13-9246 for slightly modified engines. FITS HARLEY: 1970-1978 FL, with points type ignition 1971-1978 FX, 1970-1978 XL,