Progressive front fork springs YSS - BMW R 100 CS / R 100 RS / R 100 RT / R 100 Spoke wheel / R 100 T Touring / R 80 RT - YSS

Progressive front fork spring set - YSS for BMW R 100 /7 (1977-1978) / BMW R 100 CS (1980-1984) / BMW R 100 Gussrad (1981-1984) / BMW R 100 RS (1976-1984) / BMW R 100 RT (1978-1984) / BMW R 100 Speichenrad (1981-1984) / BMW R 100 T Touren (1978) / BMW R 50 /5 (1969-1973) / BMW R 60 /5 (1969-1973) / BMW R 60 /6 (1973-1976) / BMW R 60 /7 (1976-1980) / BMW R 65 G/S (1987-1992) / BMW R 75 /5 (1969-1973) / BMW R 75 /6 (1973-1976) / BMW R 75 /7 (1976-1979) / BMW R 80 /7N (1977-1980) / BMW R 80 /7S (1977-1980) / BMW R 80 G/S Monolever (1980-1987) / BMW R 80 G/S PD Paris Dakar Monolever (1984-1987) / BMW R 80 RT (1982-1984) / BMW R 90 /6 (1973-1976) / BMW R 90 S (1973-1976).

Product Description:

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

Technical Data:
- Spring model: progressive;
- Length: 545 mm;
- Diameter: 26.5 mm;
- Spring rate 1: 5.5 N/mm;
- Spring rate 2: 7 N/mm;
- Left air chamber: 150 mm;
- Right air chamber: 150 mm;
- Recommended viscosity: 10W.

The complete application list can be found below.