NOS

Progressive Suspension Fork Spring Kit #11-1104 

Progressive Suspension Front Fork Springs Kit - CB750F 1975-1980 / CB750K 1979-1982 - Pair - Black - 11-1104

Brand: Progressive Suspension

 They were never used 

Progressive Suspension Front Fork Springs Kit For Honda CB750F 1975-1980 / CB750K 1979-1982 - Pair - Black - 11-1104Progressive springs offer a soft initial spring rate for a plush rideProgressively wound design provides increased resistance to bottoming as spring compressesImproves handling while retaining OEM geometry