YSS SUSPENSION Progressive fork spring 743.03.53

YSS Progressive Wire fork springs with a firmer design than stock.

YSS fork springs are made of high quality silicon spring steel. This allows the thickness of the wire to be reduced, which makes the spring more active and thinner, but at the same time effectively prevents twisting of the spring.

To minimize noise and improve oil flow in the fork, the springs are fully polished and ground on the top and bottom.

The scope of delivery includes 2 springs for a complete conversion of the fork.
SPRING TYPE: PROGRESSIVE
LENGTH: 525MM
DIAMETER 1: 23MM
HARDNESS 1: 4.8 N/MM
HARDNESS 2: 7 N/MM
LEFT AIR CHAMBER: 140 MM
RIGHT AIR CHAMBER: 140 MM
RECOMMENDED VISCOSITY: 10W


APPLICATIONS OF THIS PRODUCT:
According to the data provided by the manufacturer, this article is compatible with the following brands, models and years:
Yamaha RD 250 LC 27 CV, 20 kw 2cil. 4L1 4L1 Bastidores: 4L1 henceforth00101-4L1-100000 1980
Yamaha RD 250 LC 27 CV, 20 kw 2cil. 4L1 4L1 Bastidores: 4L1-300101-4L1-400000 1981
Yamaha RD 250 LC 27 CV, 20 kw 2cil. 4L1 4L2 Bastidores: 4L1-400101-4L1-500000 1981
Yamaha RD 250 LC 27 CV, 20 kw 2cil. 4L1 4L2 Bastidores: 4L1-530101-4L1-550000 1982-1983
Yamaha RD 250 LC 38 CV, 28 kw 2cil. 4L1 4L1 Bastidores: 4L1 henceforth00101-4L1-100000 1980
Yamaha RD 250 LC 38 CV, 28 kw 2cil. 4L1 4L1 Bastidores: 4L1-300101-4L1-400000 1981
Yamaha RD 250 LC 38 CV, 28 kw 2cil. 4L1 4L2 Bastidores: 4L1-400101-4L1-500000 1981
Yamaha RD 250 LC 38 CV, 28 kw 2cil. 4L1 4L2 Bastidores: 4L1-530101-4L1-550000 1982-1983