Progressive front fork springs YSS - Kawasaki GPZ 900 R Ninja Anti Dive ('84-'89) - YSS

Progressive fork spring set - YSS for Kawasaki GPZ 900 R Ninja Anti Dive (1984-1989).

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: 520 mm;
- Diameter: 29 mm;
- Spring rate 1: 5.1 N/mm;
- Spring rate 2: 7.8 N/mm;
- Left air chamber: 160 mm;
- Right air chamber: 160 mm;
- Recommended viscosity: 10W.

The complete application list can be found below.