Progressive front fork springs YSS - Honda CB 650 / CB 750 F Bol d´Or / Kawasaki Z 1000 A / Z 1000 MK2 / Z 650 B - YSS

Progressive fork spring set - YSS for Honda CB 650 (1979-1982) / Honda CB 750 F Bol d´Or (1980-1982) / Honda CB 750 F2 Bol d´Or (1982) / Kawasaki Z 1000 A (1978-1979) / Kawasaki Z 1000 MK2 (1979-1980) / Kawasaki Z 650 B (1977-1980).

Product Description:

- YSS internal fork springs set firmer than the original;
- YSS progressive wound fork springs are made from high-quality steel;
- This allows for a reduction in wire thickness making the spring more responsive;
- To improve oil flow in the fork, the springs are fully polished and ground on the top and bottom;
- This also reduces noise in the fork;
- The delivery package includes 2 springs for a complete fork conversion;

Technical Specifications:
- Spring model: progressive;
- Length: 525 mm;
- Diameter: 25 mm;
- Spring rate 1: 6 N/mm;
- Spring rate 2: 8 N/mm;
- Left air chamber: 150 mm;
- Right air chamber: 150 mm;
- Recommended viscosity: 10W.

The complete application list can be found below.