Progressive Front Fork Springs YSS - Honda CB 1100 R ('81-'83) / Kawasaki GPZ 1100 B ('81-'82) / Z 1000 J ('81-'82) - YSS

Progressive fork spring set - YSS for Honda CB 1100 R (1981-1983) / Kawasaki GPZ 1100 B (1981-1982) / Kawasaki Z 1000 J (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: 530 mm;
- Diameter: 28.5 mm;
- Spring rate 1: 5 N/mm;
- Spring rate 2: 7.5 N/mm;
- Left air chamber: 160 mm;
- Right air chamber: 160 mm;
- Recommended viscosity: 10W.

The complete application list can be found below.