Progressive Front Fork Springs YSS - Kawasaki GPX 600 R ('88-'99) / Kawasaki GPZ 600 R Ninja ('85-'90) - YSS

Progressive fork spring set - YSS for Kawasaki GPX 600 R (1988-1999) / Kawasaki GPZ 600 R Ninja (1985-1990).

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 at 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: 490 mm;
- Diameter: 30 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.