Progressive front shock absorbers YSS - Kawasaki Z 550 B ('81-'82) - YSS

Progressive fork spring set - YSS for Kawasaki Z 550 B (1981-1982).

Product Description:

- YSS internal fork springs are stiffer than the original;
- The 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: 580 mm;
- Diameter: 26.5 mm;
- Spring rate 1: 4.5 N/mm;
- Spring rate 2: 6 N/mm;
- Left air chamber: 140 mm;
- Right air chamber: 140 mm;
- Recommended viscosity: 10W.

The complete application list can be found below.