YSS SUSPENSION Progressive fork spring 743.03.64

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: 510MM
DIAMETER 1: 23MM
HARDNESS 1: 4.7 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 XS 400 SE Special 27 CV, 20 kw 2cil. 4G5 4G5 Bastidores: 4G5 henceforth10101-4G5 henceforth30000 1981
Yamaha XS 400 SE Special 27 CV, 20 kw 2cil. 4G5 4G5 Bastidores: 4G5 henceforth30101-4G5 henceforth50000 1982-1983